On The Bonnie, Bonnie Banks o’ Loch Lomon’
I couldn’t resist using the first line of one of the most famous Scottish traditional songs, as the title of this post.
But a very significant power station project, is to be undertaken in the area.
These are the opening few sentences of the Wikipedia entry for the Loch Sloy Hydro-Electric Scheme.
The Loch Sloy Hydro-Electric Scheme is a hydro-electric facility situated between Loch Sloy and Inveruglas on the west bank of Loch Lomond in Scotland. It is also within the Arrochar Alps. The site was originally suggested as the location of a huge pumped-storage scheme in 1936 by Edward MacColl, but this was rejected as being uneconomic. After the North of Scotland Hydro-Electric Board was created in 1943, it became the first of their proposed schemes.
This Google Map shows Loch Lomond and Loch Sloy.
Note.
- Loch Sloy is in the North-West corner of the map.
- Loch Lomond is on the Eastern side of the map.
- The red arrow indicates the main buildings of the LochSloy Hydro-Electric Power Station.
- Loch Sloy is eight-hundred feet above Loch Lomond.
- The total generating capacity of the power station is 152.5 MW.
The facility is operated by Scottish and Southern Energy, and is normally in standby mode, ready to generate electricity to meet sudden peaks in demand. It can reach full capacity within 5 minutes from a standing start.
This second Google Map shows the power station to a larger scale.
Note.
- Loch Sloy is to the North-West of the North-West corner of the map.
- Loch Lomond is on the Eastern side of the map.
- The red arrow indicates the main buildings of the Loch Sloy Hydro-Electric Power Station.
- The four pipes carry water from Loch Sloy to the actual power station.
- The single-track West Highland Line crosses over the four pipes at their South-Eastern end.
The design of Loch Sloy Hydro-Electric Power Station is typical of many hydro-electric stations all over the world.
This third map is an OpenRailwayMap of the area.
Note.
- Loch Sloy is on the Western side of the map.
- Loch Lomond is on the Eastern side of the map.
- The yellow track is the single-track West Highland Line between Glasgow and Mallaig via Fort William
- The blue arrow indicates Ardlui station.
The railway goes close to the power station.
A Platinum Celebration for Sloy Power Station!
The title of this section is the same as this must-read web page on the SSE web site, which dates from 2020.
Sloy Power Station Development Plans
This second must read web page on the SSE web site is entitled Sloy Power Station.
This is the sub-heading.
We’re Proposing To Convert Our Iconic 1950s Hydro Station To Pumped Storage Hydro
This is the introduction to the development.
In April 2025, we submitted a planning application to the Scottish Government to convert the iconic Sloy Power Station into a pumped storage hydro scheme.
Our proposals would bolster energy security and help provide the large-scale and flexible renewable energy back-up needed in a future UK net zero power system, helping meet the UK Government’s ambition of Clean Power by 2030.
If approved for delivery, the converted Sloy scheme would be capable of delivering up to 16GWh of long-duration electricity storage capacity.
It could provide firm, flexible renewable energy for up to 100 hours non-stop.
It appears that the upgraded power station will effectively become a 160 MW/16 GWh long duration energy store.
Currently, the UK’s largest pumped storage power station is the 1727 MW/9.1 GWh Electric Mountain in North Wales.
The updated Sloy power station will have less output, but more storage capacity, than Electric Mountain.
Should There Be A Railway Station At Loch Sloy Power Station?
Google AI gives this answer in reply to “Loch Sloy Railway Station”.
There was never a permanent public railway station called Loch Sloy, but temporary private platforms like Inveruglas railway station and Faslane Platform railway station served the area. These stops were built in 1945 by the London and North Eastern Railway (LNER) to haul materials and workers—including prisoners of war—for the construction of the Loch Sloy Hydro-Electric Scheme.
Note.
- Surely, similar reasons to those in 1945 could apply to the development of the power station. Materials and workers could be brought in by rail.
- Given, the power station’s historic significance, I believe that it could become a tourist attraction and/or education centre.It could be a stop for the Caledonian Sleeper.
I believe that as time passes, the power station’s historic significance will increase.
Are There Any Other Hydro Power Stations, That Can Be Upgraded To Pumped Storage Hydro?
Google AI can’t find anything at present.
Has The Clacton Constituency Anything To Do With The Offshore Wind Industry?
I ask this question as Nigel Farage, who is the sitting MP has called a by-election.
Before I answer, the question in the title, I will ask Google AI if he supports wind farms.
I received this reply.
Nigel Farage does not support offshore wind farms. As the leader of Reform UK, he opposes them and has pledged to eliminate renewable energy subsidies, impose a windfall tax on wind developers, scrap net-zero targets, and prioritize the expansion of North Sea oil and gas extraction.
Put this alongside the answer to the question I put in the title of this post.
Yes, the Clacton constituency is directly connected to the offshore wind industry through both established infrastructure and future energy projects off its coastline.The constituency’s specific ties to the wind sector include:
Gunfleet Sands Offshore Wind Farm: Located just 7 kilometers (about 4 miles) off the coast of Clacton and Holland-on-Sea, this wind farm has been operating since 2010. It features 48 turbines and can be seen directly from the town’s beachfront.
Electrical Connection Points: The Gunfleet Sands Offshore Transmission Owner (OFTO) system connects this wind farm to the UK’s national grid via cables and onshore substations based in the local area.
Five Estuaries Offshore Wind Farm: The Clacton coastline falls within the proposed zone for this massive £1.5 billion project. Jointly developed by SSE Renewables and RWE, the project is projected to power over 400,000 homes, with onshore grid infrastructure and cabling proposed for the North Essex area.
If the right independent candidate stood againt Farage, this could be an interesting contest.
News From Four Big Projects On The 15th May 2026
Are things hotting up in the offshore wind business in the UK? Or is it just a coincidence?
But these four projects were all announced on the 15th May 2026.
Aberdeenshire Council Greenlights Onshore Plans For 1 GW Scottish Floating Wind Project
The Buchan Offshore Wind consortium, comprising BayWa r.e., Elicio, and BW Ideol, has received planning consent from Aberdeenshire Council for the onshore infrastructure that will connect the proposed 1 GW Buchan floating wind farm to the grid. Commissioning in 2033.
Ocean Winds Receives Full Onshore Planning Consent for 2 GW Caledonia Offshore Wind Farm
Ocean Winds, a 50-50 joint venture owned by EDP Renewables and ENGIE, has received full onshore planning consent for its 2 GW Caledonia offshore wind farm following approval by Aberdeenshire Council’s Infrastructure Services Committee on 14 May. Commissioning in 2032.
UK Grants Development Consent For 3 GW Dogger Bank South Offshore Wind Project.
The UK Department for Energy Security and Net Zero has granted development consent for two Dogger Bank South (DBS) offshore wind farms, Dogger Bank South West and Dogger Bank South East, which are planned to have a combined installed capacity of 3 GW. Commissioning in 2031 (DBS West) and 2032 (DBS East).
RWE and SSE Secure Consent For 1 GW North Falls Offshore Wind Farm
The North Falls Offshore Wind Farm joint venture between RWE and SSE Renewables has been granted development consent for its 1 GW project by the UK Department for Energy Security and Net Zero (DSNEZ). Commissioning in 2030.
It looks like another 7 GW of onshore wind is on its way! The commissioning dates are my best estimates based on past history.
SSE’s Littleton Solar Farm Enters Full Operation
The title of this post, is the same as that of this press release from SSE.
This is the sub-heading.
Completed 31MW solar farm can power 10,000 UK homes annually
These four paragraphs add more details about the solar farm.
SSE’s 31MW Littleton Solar Farm near Evesham, Worcestershire has now entered full operation following a two-year construction delivery programme.
The newly completed solar farm can now generate enough clean electricity to typically power around 10,000 homes per year.
Its delivery marks another important contribution by SSE towards the delivery of homegrown, affordable, and secure clean energy to UK consumers.
The completion of Littleton marks the delivery of SSE’s first operational solar farm asset. Construction began in December 2023 and was delivered in partnership with Grupotec which acted as main contractor for the project.
This further paragraph talks about enhancing biodiversity.
Littleton Solar Farm has incorporated a wide range of measures across its 77 acre site to protect and enhance local biodiversity. These include maintaining existing hedgerows, planting new trees and hedgerows with locally sourced species, and establishing wildflower margins to support pollinators.
One of the reasons, I wrote about Littleton solar farm is that it is a detailed press release with an excellent aerial photo.
- It generates 31 MW.
- It covers 77 acres.
- It can power 10,000 UK homes annually.
- It took two years to build.
- Grupotec were the main contractor.
Everything is there to give a rough estimate for a solar field.
Consultation Opens For Ferrybridge Next Generation Power Station
The title of this post, is the same as that of this press release from SSE.
These three bullet points act as sub-headings.
- Ferrybridge Next Generation sets out plans for continuing the legacy of power generation at the site, with the potential to bring significant investment to the region.
- Statutory consultation phase launched, inviting communities and stakeholders to have their say on project proposals.
- Hydrogen-enabled project could support the security of supply and offer a clear route to decarbonisation.
These three paragraphs add more detail.
Members of the public are being invited to have their say on plans for a proposed new power station in development, Ferrybridge Next Generation Power Station.
The station is being designed so that it can run on hydrogen, as a lower-carbon alternative to natural gas. It would also be able to operate using natural gas or a blend of hydrogen and natural gas until a technically and commercially viable hydrogen supply becomes available to the site.
With a proposed capacity of up to 1.2GW, Ferrybridge Next Generation Power Station could play an important role in supporting the UK’s energy system in the short term – providing reliable flexible back-up power during periods of peak demand and balancing the system when the wind doesn’t blow or the sun doesn’t shine, while delivering a route to decarbonised power generation in the longer term.
Note.
- A 150 MW/300 MWh Battery Electric Storage System is being developed on the site, which I wrote about in SSE Renewables Announces Construction Of Second Utility-Scale Battery Storage System.
- The last Ferrybridge power station; C had a capacity of just over 2 GW.
- This will be SSE Renewable’s second hydrogen-fired power station after Keadby, which I wrote about in Consultation On Plans For Keadby Hydrogen Power Station To Begin.
- As the press releases says, Ferrybridge Hydrogen-Fired Power Station will be West Yorkshire’s backup for when the wind doesn’t blow and the sun doesn’t shine.
How similar will the two hydrogen-fired power stations be?
Will SSE Be Building Any More In The First Wave Of Hydrogen-Fired Power Station?
This is a paragraph from SSE’s press release.
The station is being designed so that it can run on hydrogen, as a lower-carbon alternative to natural gas. It would also be able to operate using natural gas or a blend of hydrogen and natural gas until a technically and commercially viable hydrogen supply becomes available to the site.
It would appear that the availability of the hydrogen fuel may be a problem.
But places like Aberdeen, Bradford, Brighton, Humberside and Merseyside, do seem to be planning for hydrogen, so all is not lost.
AI Forecast To Fuel Doubling In Data Centre Electricity Demand By 2030
The title of this post, is the same as that as this article in The Times.
This is the sub-heading.
International Energy Agency predicts that artificial intelligence could help reduce total greenhouse gas emissions
These are the first two paragraphs.
Data centres will use more than twice as much electricity by 2030 than they do today as artificial intelligence drives demand, the International Energy Agency predicts.
The agency forecast that all data centres globally will use about 945 terawatt-hours of electricity each year by 2030, roughly three times as much as the UK’s total annual demand of 317 terawatt-hours in 2023.
I am very much an optimist, that here in the UK, we will be able to satisfy demand for the generation and distribution of electricity.
- Our seas can accommodate enough wind turbines to provide the baseload of electricity we will need.
- Roofs and fields will be covered in solar panels.
- SSE seem to be getting their act together with pumped storage hydro in Scotland.
- I am confident, that new energy storage technologies like Highview Power with the packing of companies like Centrica, Goldman Sachs, Rio Tinto and others will come good, in providing power, when the wind doesn’t blow and the sun doesn’t shine.
- Hopefully, Hinckley Point C and Sizewell C will be online and soon to be joined by the first of the new small modular nuclear reactors.
- Hopefully, Mersey Tidal Power will be operating.
- There will be innovative ideas like heata from Centrica’s research. The economical water heater even made BBC’s One Show last week.
The only problem will be the Nimbies.
SSE Files Plans For 100 MW Pumped Hydro Scheme
The title of this post is the same as that of this article on reNews.biz.
This is the sub-heading.
Proposal aims to convert iconic Sloy Power Station into storage facility by end of 2030
These three paragraphs outline the proposals.
SSE has submitted plans to the Scottish Government for the 100MW Sloy pumped storage hydro scheme.
The plans would see the existing Sloy Power Station – a conventional hydro power station – on the banks of Loch Lomond converted into a pumped storage hydro scheme with a pumping capacity of up to 100MW.
If given the green light, the converted Sloy scheme would be capable of delivering up to 16GWh of long-duration electricity storage capacity.
SSE intend to make an investment decision by late 2027 and this is said about increasing capacity.
As part of the planning application, SSE Renewables is also proposing to upgrade the existing 32.5MW G4 turbine to match its sister units, which would increase the station’s generating output by 7.5MW to 160MW.
This appears to be a world-class example of canny Scottish engineering.
The project would turn the current 152.5 MW hydroelectric power station into a 160 MW/16 GWh pumped storage hydroelectric power station.
Not a bad transformation, that was opened three years after I was born.
SSE And Gilkes Energy Submit Plans For Pumped Hydro Storage Project
The title of this post, is the same of this article in Solar Power Portal.
This is the sub-heading.
SSE Renewables and Gilkes energy have submitted a planning consent application to Scottish Ministers for a proposed Pumped Storage Hydro (PSH) project.
These two paragraphs add more detail.
The Fearna PSH project is proposed as a 50:50 joint venture project between SSE and Gilkes Energy, with Gilkes Energy leading the development under a developer services agreement with SSE Renewables. The scheme will have an installed capacity of 1.8GW and a stored capacity of up to 36GWh, providing 20 hours of storage. If approved, the project would be the largest pumped hydro scheme in the UK.
The proposed site is located around 25km from Invergarry in the Scottish Highlands and adjoins SSE Renewables’ existing Loch Quoich reservoir, which forms part of the Great Glen hydro scheme. The development will include the construction of tunnels and a new power station that will connect the existing Loch Quoich reservoir to an upper reservoir at Loch Fearna.
This Google Map shows the location of Invergarry and Loch Quoich.
Note.
Loch Quoich is the dolphin-shaped loch at the West of the image.
Invergarry is indicated by the red dot at the East of the image.
This second Google Map shows the location of Loch Fearna to the North-East of Loch Quoich.
These are my thoughts.
It Will Be A Large Scheme
With an installed capacity of 1.8GW and a stored capacity of up to 36GWh, providing 20 hours of storage, this is not a small scheme.
Wikipedia’s Description Of Loch Quoich
This is the first two paragraphs of the Wikipedia entry for Loch Quoich.
Loch Quoich (Scottish Gaelic: Loch Chuaich) is a loch and reservoir situated west of Loch Garry approximately 40 km northwest of Fort William, Lochaber, Scotland. The name means “loch of the quaich”. In 1896, it was listed as six miles long and three-quarters of a mile in width, belonging to Mrs. Ellice of Glenquoich, within the parish of Kilmonivaig.
Both lochs form part of the Glen Garry hydroelectricity project commissioned by the North of Scotland Hydro-Electric Board in the 1950s.
So is the Loch Fearna scheme, a massive repurposing of the existing Glen Garry hydroelectricity project?
I wrote about this before in Repurposing The Great Glen Hydro-Electric Scheme?
This map from the SSE Renewables web site shows the layout of the dams and power stations between Loch Quoich and Invergarry..
The sizes of the power stations in the scheme are as follows.
- Ceannacroc – 20 MW
- Livishie – 15 MW
- Glenmoriston- 37 MW
- Quoich – 18 MW
- Invergarry – 20 MW
- Mucomir – 1.7 MW
This gives a total power of 112.7 MW.
112.7 MW to 1.8 GW (1800 MW) is a colossal increase in power.
It should be noted that 1.8 GW is half the power of Hinckley Point C nuclear power station.
How To Keep The Lights On When The Wind Doesn’t Blow
The title of this post, is the same as that of this article in The Times.
This is the sub-heading.
Britain came close to a blackout this month. Gas is being phased out and renewables are intermittent, so can energy storage stop us going dark?
These are the first two paragraphs.
It was 8.29pm on the first Tuesday in January when the alert was issued by the electricity control room. Freezing temperatures had coincided with unusually low wind speeds, and it was making the National Energy System Operator (Neso) jittery.
Engineers forecast a 1.6GW shortfall — the requirement for about 1.5 million homes — for a three-hour period from 4pm the following afternoon. “System operators are requested to notify Neso of any additional megawatt capacity,” the message said.
Luckily, the plea worked.
The article then goes on to describe the various technologies that are being deployed.
The article starts by talking about pumped storage hydroelectricity.
This paragraph gives a superb illustration about how things have changed in energy and energy storage in the UK in the last few decades.
In the past, when coal provided the bulk of British power, this system was used to meet fluctuating demand levels. But now it is also required to meet fluctuating supply levels from renewable sources. Martin Pibworth, chief commercial officer at SSE, started with the company as a trainee in 1998. “Back then, at our Foyers pumped storage plant [at Loch Ness] we would switch modes, from pumping to not pumping and back again, maybe 600 to 700 times a year. Last year we switched modes there 6,500 times. It’s an insight into how the market has changed and how much more flexibility is needed, and how responsive that has to be.”
We have to be more agile, with our handling of storage to back up the various methods of generation.
The Anonymous Widower 