New National Grid Substation Fully Operational, Transmitting Clean Power To 1.5 Million Homes
he title of this post, is the same as that of this press release from National Grid.
These three bullet points act as sub-headings.
- National Grid’s new Littlebrook 400kV substation in Dartford, Kent is now fully energised.
- The facility enables the transmission of 2GW of low carbon and renewable energy from interconnectors and offshore wind farms off the coast of Kent to power around 1.5 million homes.
- New technology deployed to reduce emissions at the site.
This is the first three paragraphs, which outline the project.
National Grid has successfully commissioned a new, state-of-the-art substation, in Dartford, Kent, enabling 2 gigawatts (GW) of low carbon and renewable energy to power around 1.5 million homes.
National Grid and its contractors Balfour Beatty and GE Vernova’s Grid Solutions have been working since June 2019 to build a replacement for Littlebrook 400kV substation.
The new facility will help to reduce the use of sulphur hexafluoride (SF₆), a gas commonly used in the electrical industry to prevent short circuits and to keep the network safe and reliable.
These two paragraphs explain how the new substation fits in with National Grid’s SF₆ policy.
Engineers are using GE Vernova Grid Solutions’ innovative g3 gas-insulated busbar equipment which is SF6- free. A total of 5.6 tonnes of SF₆ gas has been saved, forming part of National Grid’s ambition to reduce its SF₆ emissions by 50% by 2030 and removing all SF₆ gas from electrical assets by 2050.
Teams have also deployed net zero construction methods throughout the project to reduce the environmental impact of the works, including steel manufactured in Britain, solar powered electrics, electric vehicle charging points, biodiversity net gain plan for the local area and an onsite biodigester to manage wastewater, all saving 5229 tonnes of CO₂ emissions during construction.
National Grid have this page on their web site, which is entitled What Is SF6? Sulphur Hexafluoride Explained, where this is the first paragraph.
Sulphur hexafluoride – also known as SF6 – is a ‘greenhouse gas’ that has long played a part in global warming, similar to that of carbon dioxide (CO2).
Hence the need for its removal.
Conclusion
Removal of sulphur hexafluoride from the world’s electricity substations and switchgear will be a very large task.
Simon Reeve’s South America
I am just watching episode two of this television series on BBC2.
It is definitely a must-watch. You can watch it here.
Interestingly, the program was giving a similar message about the rain forest, that I talked about in The Enforcer From The World Bank.
Australia Climate Protest: Rising Tide Activists Shovel Coal Off Train
The title of this post, is the same as that of this article on the BBC.
This is the sub-heading.
About 50 climate activists have been arrested in the Australian state of New South Wales after protesters climbed on a train carrying coal and began shovelling its cargo out of the wagons.
At least with coal, the mess won’t do too much damage.
National Grid Avoids Emissions At London Power Tunnels Substation With Green Grid Technology
The title of this post, is the same as that of this press release from National Grid.
These are the main bullet points.
- £1bn project to rewire London will see the replacement of ageing high-voltage electricity cables and expand network capacity to meet the increasing electricity demand
- A new substation at Bengeworth Road in Lambeth is at the heart of the project and will be built by Linxon using Hitachi Energy’s SF6 free gas insulated switchgear technology in a UK first
- The project forms part of National Grid’s ambition to have no SF6 in electrical assets by 2050
- National Grid is investing a total of £1.3bn every year in electricity network infrastructure needed to help the UK decarbonise and reach net zero emissions
I’ll now expand some of these points.
The London Power Tunnels
This is said about the London Power Tunnels.
National Grid’s London Power Tunnels (LPT) project is a seven-year, £1 billion project, to rewire South London via deep underground tunnels. This vital work to replace ageing high-voltage cables will expand capacity and help keep Londoners connected to secure and reliable electricity supplies.
Note.
- In total, there are 32.5km of 3m diameter tunnels.
- They stretch between Wimbledon and Crayford.
- As part of the project, a new tunnel access shaft, substation and headhouse is being built at Bengeworth Road, Lambeth to connect to our London Power Tunnels (LPT) route.
The London Power Tunnels have their own web site.
Sulphur Hexafluoride
This is said about Sulphur Hexafluoride.
Sulphur Hexafluoride (SF6 ) is used in the electricity industry in substations to prevent short circuits and to keep the network safe and reliable, but it has a high global warming potential. National Grid’s ambition is to reduce its SF6 emissions by 50% by 2030 and remove all SF6 gas from electrical assets by 2050.
Linxon is building Bengeworth Road substation for National Grid and to support the business in its transition to SF6 -free solutions, in a UK first, Hitachi Energy will deliver EconiQ™ 400-kilovolt (kV) gas-insulated switchgear (GIS) and gas-insulated lines (GIL) containing no SF6, to enable the transmission of energy over long distances. Installation is expected to begin in 2023, subject to prior approval of the substation by Lambeth Council.
In the Wikipedia entry for sulphur hexafluoride, this is said.
SF6 is 23,500 times more potent than CO2 as a greenhouse gas but exists in relatively minor concentrations in the atmosphere. Its concentration in Earth’s troposphere reached 10.63 parts per trillion (ppt) in 2021, rising at 0.39 ppt/year.[8] The increase over the prior 40 years was driven in large part by the expanding electric power sector, including fugitive emissions from banks of SF6 gas contained in its medium- and high-voltage switchgear. Uses in magnesium, aluminium, and electronics manufacturing also hastened atmospheric growth.
As I have a lot of experience of HF, my view is that we’re well shot of the SF6, but I’ll be 103, when National Grid eliminate it.
Dual-Fuel Class 37 And 66 Locomotive Concepts Unveiled
The title of this post, is the same as that of this article on Railway Gazette.
This is the first paragraph.
G-volution and SBL-Rail have produced design concepts for dual-fuel versions of Class 37 and 66 locomotives, which would be able to run on diesel with biomethane, biopropane or hydrogen.
Note.
- There are about sixty Class 37 locomotives in service or stored.
- 480 Class 66 locomotives were originally produced and over 300 must still be in service.
- Both locomotives have electric transmissions.
- G-volution are developing a dual-fuel Class 180 train, that I wrote about in Grand Central DMU To Be Used For Dual-Fuel Trial.
- Two of the design concepts involve replacing the current diesel engines with modern Cummins engines, that meet current emission regulations.
- Fuel savings of ten percent are mentioned for one engine conversion.
This is said about the dual-fuel conversions.
Biomethane and biopropane dual fuel engines would offer significant carbon and cost savings verses diesel. Hydrogen has the potential to do so if produced from renewable sources, but would need to be ‘much cheaper’ than it is today.
The article then gives a table, which shows the various savings.
The article comes to these conclusions.
- Biomethane and biopropane prices are expected to fall, as production increases.
- Green hydrogen is too expensive, but costs will come down.
- More rises in the price of diesel, will tilt costs towards alternative fuels.
I feel that to get the emissions and costs down, there would need to be a bit of cheating.
Look at this picture of a Class 66 locomotive under 25 KVAC electrification.
I wonder, if a pantograph and all the electrical gubbins could be fitted to a Class 66 locomotive to create a genuine electro-diesel locomotive.
- It would use electrification, where it exists.
- It would use the existing electric transmission.
- I do suspect though that the Class 37 locomotive may be more difficult to convert because of its age.
It should be noted that in GB Railfreight Plans Order For Future-Proofed Bi-Mode Locomotives, I talk about how GB Railfreight are proposing to purchase a fleet of new electro-diesel freight locomotives, that appears will have Class 66 locomotive performance on both electrification and diesel.
The Involvement Of Cummins
Cummins, who are one of the world’s largest manufacturers of diesel engines, could have a lot to lose from the move to zero-carbon.
- But they have adopted an if-you-can’t-them-join-them philosophy to hydrogen.
- They have bought up hydrogen companies like Hydrogenics.
- They are developing internal combustion engines that can run on hydrogen.
- Cummins have claimed to me, that they will try to fill any niche market with their engines, so it would be likely, they would apply that philosohy to hydrogen.
I believe that Cummins will not give up their market share without a fight.
I would expect, Cummins will actively support G-volution’s plans, if it would sell upwards of fifty large engines.
Conclusion
I have four main conclusions.
- I believe that this study could lead to a very significant and worthwhile updating of a Class 66 locomotive.
- The locomotive would need to be modified so it could use electrification.
- But I am more dubious, that this could be done with the Class 37 locomotive.
- I also believe that Cummins will be part of the solution.
In the wider world, I also believe that to retain their turnover and market share, Cummins and the other big diesel engine manufacturers will come up with increasingly innovative solutions.
Caterpillar, Cummins, Deutz, JCB, MTU and others will not give up multi-billion businesses without a fight.
Wabtec’s 100% Electric Locomotive Trickle Suddenly Becomes International Flood
The title of this post, is the same as that of this article on Clean Technica.
This is the introductory paragraph.
Whelp, that was fast. The locomotive manufacturer Wabtec lit up the Intertubes last November when it debuted the new FLXdrive 100% electric locomotive in Pennsylvania, but that was just the beginning. The company has nailed down two clients in Australia for its carbon-free choo-choo while also locking in a spot on the new Europe’s Rail Joint Undertaking, which aims to green up railway systems throughout Europe.
It certainly has been quick.
Usually, only in times of war, do things go that fast.
But you could argue that climate change is as big a threat to the world than China, Iran, North Korea or Russia.
Could Universal Hydrogen’s Concept Create A Hydrogen-Powered Single-Aisle Airliner?
Universal Hydrogen are making some of what I would consider the right moves.
Hydrogen Supply
Universal Hydrogen have signed a supply contract with Fortescue Future Industries for the supply of green hydrogen.
The deal is described in this press release on the FFI web site, which is entitled FFI And Universal Hydrogen Join Forces To Decarbonise Aviation.
Collaboration With Airbus
There is an article on BusinessWire, which is entitled Universal Hydrogen Announces New Engineering Development Center Located In Toulouse, France, The Heart of European Aviation.
Toulouse is the home of Airbus.
The Capsule Concept
The capsule concept could be universal.
These are widths of various planes and trains.
- De Havilland Canada Dash 8-400 – 2.52 metres – Internal
- Airbus ATR 72 – 2.57 metres- Internal
- Airbus A320neo – 3.7 metres – Internal
- Boeing 737 – 3.53 metres – Internal
- Class 800 train – 2.7 metres – External
- Class 66 locomotive – 2.65 metres – External
I suspect that if the design is correct, then one size of capsule can be made to fit a variety of applications.
Application To Regional Aviation
I discussed this in Flybe Appears To Be On The Way Back.
I believe that De Havilland Canada Dash 8s and Airbus ATR 72s could be converted to hydrogen.
Road Transport
Surely, the capsules would be too big for road transport in the UK and many other countries.
But they would probably be ideal to deliver hydrogen to bus and truck depots and filling stations for hydrogen vehicles. They would just be plugged in and then could start dispensing the fuel.
Decarbonation Of Diesel Locomotives
Consider.
- The cross-section of a diesel locomotive even in the UK, is larger than that of a regional airliner.
- Most of the space in the body of a diesel locomotive is taken up by a large diesel engine.
- Fuel ells or a small gas turbine could be small compared to the diesel engine.
- Most existing diesel locomotives have electric transmissions.
I believe that many diesel-electric locomotives could be converted to hydrogen power and some could use Universal Hydrogen’s capsules.
Zero-Carbon Backup Generators
Many pieces of important infrastructure, like data centres, hospitals and large railway stations have backup generators.
Universal Hydrogen’s capsules could provide hydrogen for zero-carbon backup generators.
Universal Hydrogen’s Ideas For Single-Aisle Airliners
In the Product page on the Universal Hydrogen web site, there is a section, which is entitled Single Aisle / Narrowbody, where this is the first two sentences.
The majority of aviation emissions are produced by the single aisle (also known as narrowbody) fleet, dominated by the Boeing 737 and Airbus A320 families of aircraft. Both Boeing and Airbus are likely to develop a replacement for these venerable models for entry into service in the mid 2030s.
Alongside the text is this graphic, which compares various airliners.
Universal Hydrogen are proposing that Airbus stretch the A321, so that hydrogen capsules can be fitted in the rear of the fuselage, so that the aircraft has similar proportions to the Boeing 757.
Read the full text on the Product page of the Universal Hydrogen web site.
I can see that if they could prove the concept with the Regional Airliner, they could develop the two concepts shown in the graphic.
Conclusion
This is a simple, but very exciting project.
Reinstating The Line Between Tavistock And Bere Alston And Providing New Services To And From Plymouth
On October 27th this Beeching Reversal Project was given £50,000 to build a case for reinstating.
This project finally seems to be getting going.
The complete reinstatement between Exeter and Plymouth seems to be developing into a three-phase project.
- Phase 1 – Exeter and Okehampton – This is now complete and trains are test running, with services due to start on the 20th November.
- Phase 2 – Tavistock And Bere Alston – This section is being planned and if approved could be the next section to be opened.
- Phase 3 – Tavistock and Okehampton – This would complete the reinstatement of the route between Exeter and Plymouth.
These are my thoughts.
The Completion Of Phase 1
Trains are now test running to between Exeter and Okehampton.
The full service starts on the 20th November.
- On that day, there will be eight trains per day (tpd) in both directions.
- Trains will leave Exeter at 06:32, 08:41, 10:36, 12:37, 14:38, 16:36, 18:48 and 21:00.
- Trains will leave Okehampton at 07:39, 09:45, 11:39, 13:39, 15:39, 17:46, 19:51 and 22:34.
- Trains are times to take around forty minutes for each trip.
- The service is pathed as a Class 150/153/155/156 DMU
- The service is planned for a maximum speed of 75 mph.
Note.
- This is approximately one train per two hours (tp2h).
- It looks like the service could be worked by a single train shuttling all day.
The Wikipedia entry for Okehampton station says this.
The service will increase to hourly towards the end of 2022.
It has been a very smooth restoration of service.
Okehampton Parkway Station
Okehampton Parkway station is to be built to the East of Okehampton at Stockley Hamlet.
- It will be close to a junction with the A30 dual-carriageway, which links London and Penzance.
- The A30 connects to the Cornish Main Line in Cornwall at Bodmin, Redruth and Penzance.
It looks like it could be a very useful Park-and-Ride station for Exeter and Okehampton.
Could The Okehampton Stations Be Used To By-Pass Dawlish?
In 2014, the sea breached the sea wall and the railway at Dawlish, on the Great Western Main Line between Exeter and Plymouth. Trains couldn’t run past Exeter.
I very much feel that with global warming and seemingly increasingly bad weather that we can’t say that a breach won’t happen again.
Could it be possible to use the one of the Okehampton stations, as a terminal for a Rail Replacement service that connected to Plymouth and Cornwall?
The Gap Between Okehampton And Bere Alston
This Google Map shows the gap between Okehampton and Bere Alston stations.
Note.
- Okehampton is at the top of the map between the three green rectangles which mark the main roads.
- Bere Alston is in the South-West corner of the map.
- Tavistock is North of Bere Alston.
- The three places are connected by the A 386 road.
Is there a bus between Okehampton and Bere Alston, that serves Tavistock and the major villages?
Phase 2 – Tavistock And Bere Alston
This Google Map shows between Tavistock and Beer Alston station.
Note.
- Tavistock is in the North-East corner of the map.
- Bere Alston is in the South-West corner of the map.
- I estimate that about six miles of new track will have to be laid.
This Google Map shows Bere Alston station, which is to the North-West of the village.
Note.
- Bere Alston station is on the Tamar Valley Line.
- The Tamar Valley Line is all single-track.
- Trains to and from Gunnislake station use the Northbound track at the junction to the West of the station.
- Trains to and from Plymouth use the Southbound track at the junction to the West of the station.
- Trains between Gunnislake and Plymouth reverse at Bere Alston station.
It would appear that the route to Tavistock continued to the East.
This Google Map clearly shows the route of the disused railway as it runs North-East from Bere Alston station.
Note.
Bere Alston station is the South-West corner of the map.
The dark green line of the railway runs to the North-East corner of the map.
As all the railways in the area seem to have been single-track, I would suspect that any rebuilt railway on this route will be single track.
I have followed the dark green line through to Tavistock which is shown in this Google Map.
As the Department of Transport are prepared to finance a study for reinstatement of the route, I would suspect that there is a feasible route between Bere Alston and Tavistock.
- There would appear to be no bridges or viaducts between Bere Alston and the outskirts of Tavistock.
- Before closure, there no stations between Bere Alston and Tavistock North stations.
- Bere Alston station would need to be rebuilt.
The Wikipedia entry for Tavistock North station, says this about the condition of the line.
The station building has been restored and converted into three self-catering cottages. The stationmaster’s house is being restored as a private dwelling, while the goods yard, now known as Kilworthy Park, houses the offices of West Devon Borough Council. The track bed for about one mile (1.6 km) south of Tavistock North station is open to the public as a footpath and nature reserve, and it is possible to walk across the viaducts that overlook the town.
The rest of the track bed south of Tavistock is almost intact to Bere Alston, where it joins the present-day Tamar Valley Line. There has been discussion regarding the re-opening of a rail link for a number of years. Engineering assessment has shown that the track bed, and structures such as bridges and tunnels, are in sound condition.
I can foresee some problems, in what might not be one of the most challenging of projects.
- Claiming back the railway from the walkers and cyclists.
- The ownership of the stationmaster’s house.
Unlike Scotland, England didn’t make sure that rail routes could be converted back to railways if needed.
My project management knowledge leads me to agree with what appears to be a decision to do this part of the route next.
Phase 3 – Okehampton And Tavistock
The title of this project as given in the Railway Gazette article is as follows.
Reinstating The Line Between Tavistock And Bere Alston And Providing New Services To And From Plymouth
If you read this literally, it doesn’t mention anything about connecting to Okehampton and Exeter.
- Looking at maps and reading up on the line, it does appear that the route may be more challenging.
- The route also contains the Meldon Viaduct, which is a scheduled monument.
Until a viable plan is developed, it might be better and more affordable to run zero-carbon buses between Tavistock and Okehampton.
Metrolink Tram Drivers To Strike After ‘Pitiful’ Pay Offer
The title of this post, is the same as that of this article on Railnews.
The strikes will be on the 25th and 26th September, which coincide with a Manchester United home match and the Great Manchester Run.
It would appear that Unite’s new boss; Sharon Graham means business. And in Manchester’s case, a drop in business activity for two days.
I wonder how many extra tonnes of carbon dioxide will be emitted in Manchester on each day of the strike, as people swap from the electric trams to their cars.
Could High Speed Two Serve Holyhead?
Why?
It could be a way to create a zero- or low-carbon route between the islands of Great Britain and Ireland.
Battery-Electric Trains Could Be The Solution
In Will High Speed Two’s Classic-Compatible Trains Have Battery Operation?, I suggested that it might be feasible for High Speed Two’s Classic-Compatible trains to have batteries.
I said this at the start of that post.
I believe it is very likely, that High Speed Two’s new classic-compatible trains will have battery capabilities.
-
- Batteries would handle energy generated by regenerative braking.
- Batteries would give a train recovery capability in case of overhead catenary failure.
- Batteries would be used for depot movements.
- Batteries would probably improve the energy efficiency of the trains.
Effectively, the batteries would power the train and would be topped-up by the electrification and the regenerative braking.
Since I wrote that post in February 2020, Hitachi have launched two battery-electric trains, one of which is the Hitachi Intercity Tri-Mode Battery Train, which is described in this Hitachi infographic.
As diesel (or should I say Stuart) engines are so nineteenth-century. any high speed independently-powered train would probably use batteries, have no diesel engines and be a battery-electric train.
So could Hitachi or any other bidder for the High Speed Two Classic-Compatible trains produce a train, that would be capable of handling the long-distance routes from London, that would be difficult or expensive to electrify, by the use of batteries?
- Batteries will improve dramatically in the next few years.
- Batteries will also become more affordable.
- Engineers will also learn how to package them in better and more innovative ways.
I think it is very likely, that a High Speed Two Classic-Compatible train could be produced with a reliable range of over eighty miles on batteries.
Holyhead And Crewe By Battery-Electric Classic-Compatible High Speed Train
These are the distances between stops on the route between Holyhead and Crewe
- Holyhead and Bangor – 25 miles.
- Bangor and Llandudno Junction – 16 miles
- Llandudno Junction and Colwyn Bay – 4 miles
- Colwyn Bay and Rhyl – 10 miles
- Rhyl and Prestatyn – 4 miles
- Prestatyn and Flint – 14 miles
- Flint and Chester – 13 miles
- Chester and Crewe – 21 miles
Note.
- It is a route of only 105 miles.
- There is no 25 KVAC electrification, except at Crewe.
- It is nearly all double-track.
- The operating speed is 90 mph
- The route is also generally flat and mainly along the coast.
Suppose the following were to be done.
- Erect traditional electrification between Chester and Crewe.
- Hitachi ABB Power Grids build a section of their discontinuous electrification around Llandudno Junction.
- Install a battery charging system at Holyhead.
An alternative might be to put another section of discontinuous electrification through Bangor, if installing the charging station at Holyhead proved to be difficult.
I believe it would be possible to run a High Speed Two Classic-Compatible train equipped with batteries between London Euston and Holyhead.
What Time Would Be Possible?
Consider.
- High Speed Two are predicting 56 minutes between London Euston and Crewe.
- Avanti West Coast are showing journey times of one hour and 57 minutes between Crewe and Holyhead.
- Avanti West Coast are using 125 mph Class 221 trains, but are restricted to a lot less than this speed.
- The HSC Dublin Swift can sail between Dublin and Holyhead in several minutes under two hours.
I believe that a High Speed Two Classic-Compatible train equipped with batteries could go between London Euston and Holyhead in under three hours.
If this were to be linked to the latest hydrogen-powered fast ferry between Holyhead and Dublin, would London Euston and Dublin be fast enough to attract passengers from the airlines?
- The journey time could be under five hours.
- It would be zero-carbon.
- By cutting stops to the West of Chester and track improvements train times could be reduced.
- It would be the sort of adventure, that some families like!
I think that Avanti West Coast and the ferry company could have a rail and ferry service, that would appeal to many travellers.
Would There Be A Path To Euston For Another High Speed Service?
In How Many Trains Are Needed To Run A Full Service On High Speed Two?, I listed the trains that would use the Western leg of High Speed Two.
- Train 1 – London Euston and Birmingham Curzon Street – 400 metre Full-Size
- Train 2 – London Euston and Birmingham Curzon Street – 400 metre Full-Size
- Train 3 – London Euston and Birmingham Curzon Street – 400 metre Full-Size
- Train 4 – London Euston and Lancaster – Classic Compatible
- Train 4 – London Euston and Liverpool – Classic Compatible
- Train 5 – London Euston and Liverpool – Classic Compatible
- Train 6 – London Euston and Macclesfield – Classic Compatible
- Train 7 – London Euston and Manchester – 400 metre Full-Size
- Train 8 – London Euston and Manchester – 400 metre Full-Size
- Train 9 – London Euston and Manchester – 400 metre Full-Size
- Train 10 – London Euston and Edinburgh – Classic Compatible
- Train 10 – London Euston and Glasgow – Classic Compatible
- Train 11 – London Euston and Edinburgh – Classic Compatible
- Train 11 – London Euston and Glasgow – Classic Compatible
- Train 12 – Birmingham Curzon Street and Edinburgh or Glasgow – Classic Compatible
- Train 13 – Birmingham Curzon Street and Manchester – 200 metre Full-Size
- Train 14 – Birmingham Curzon Street and Manchester – 200 metre Full-Size
Note.
- A lot of the paths into London Euston would appear to be allocated.
- Train 4 is a pair of 200 metre long Classic-Compatible trains, that will split and join at Crewe, with one train going to Liverpool and the other going to Lancaster.
- Train 5 is only a single 200 metre long Classic-Compatible train.
I suspect it would be possible to make Train 5 a pair of 200 metre long Classic-Compatible trains, that will split and join at Crewe, with one train going to Liverpool and the other going to Chester and Holyhead.
It does appear that the proposed timetable for High Speed Two has been designed so extra trains can be added if the demand is there.
What Times Would Be Possible Between Holyhead And Crewe?
Consider.
- I have looked at the route from my virtual helicopter and suspect that much of the route can be upgraded to 100 mph running.
- The current average speed between Holyhead and Crewe is 54 mph.
- London Liverpool Street and Norwich is 114.5 miles and is regularly achieved in ninety minutes on a 100 mph line, which is an average speed of 76 mph.
- The number of stops could be reduced.
I can build a table of times for faster average speeds.
- 60 mph – One hour and 45 minutes – Two hours and 41 minutes
- 70 mph – One hour and 30 minutes – Two hours and 26 minutes
- 80 mph – One hour and 19 minutes – Two hours and 15 minutes
- 90 mph – One hour and 10 minutes – Two hours and 6 minutes
- 100 mph – One hour and 3 minutes – One hour and 59 minutes
Note.
- The first time is Holyhead and Crewe.
- The second time is London and Holyhead.
I am fairly certain, that a substantial time improvement is possible.
Why Not Electrify All The Way Between Holyhead And Crewe?
I am seventy-four and can remember several incidents of serious storms and flooding along the North Wales Coast Line.
There was a warning earlier this year according to this article on the BBC.
Perhaps it would be better to spend the money on improving the resilience and operating speed of the track?
Conclusion
London Euston and Holyhead could be a serious proposition.
With some development and a new fast ferry, it could also open up a practical zero-carbon route between Great Britain and Ireland.
Times of four and a half hours between London Euston and Dublin could be possible.
The Anonymous Widower 