Floating Solar Panels

Richard Holden Excerpts

Thursday 26th June 2025 Commons Chamber

[Lincoln Jopp]

The hon. Member, with whom I serve on the Defence Committee, makes a very important point about future-proofing the United Kingdom’s water supply from increased temperatures. In Australia, I understand that reservoirs are being covered at great expense to reduce evaporation. He might know that where floating solar panels exist, they reduce evaporation by 70. In the case of the Queen Elizabeth II reservoir, that is 100 tonnes of water a day. It is absolutely extraordinary.

I know Members are thinking, “Well, Lincoln, it couldn’t get any better,” but I have to tell the House that there are still some further benefits. [Hon. Members: “More!”] Where reservoirs are owned by water companies and the water companies want to use the electricity themselves, there is no requirement for planning permission. When we consider the turmoil that land-based systems have to go through over many, many years, and the paroxysms the nation puts itself through before it puts in a land-based system, we should note that floating solar can be deployed within a few weeks.

[Mr Richard Holden (Basildon and Billericay) (Con)]

This is another issue where the Conservatives can perhaps give more information to those on the Government Benches. We have real issues in many parts of rural Britain with the energy infrastructure that has to go alongside solar farms—for example, the massive mega-pylons in East Anglia. If the energy can be used onsite or if there is existing energy infrastructure, as there often is around reservoirs due to hydro and other factors, that is another great reason why floating solar is a solution that everyone can get on board with.

[Lincoln Jopp]

My hon. Friend makes a fantastic point. The Queen Mary reservoir in my constituency has a plug-in point to the national grid at one end of it. The ability to minimise the disruption that is caused by placing solar farms away from where the power is needed is certainly a consideration that plays into this.

Hon. Members will think, “Well, that must be his list complete. Those must be all the benefits of floating solar, because there can’t be any more.” But I say to the House that one of the most astonishing things about floating solar is that it improves the water quality underneath, as it is denuded of light and heat. There are things that grow in the water which the water companies subsequently have to filter out to make it tap-ready for us and our constituents. The water companies have to use fewer filtrants where the surface has been covered by floating solar. We have covered the evaporative effect, so I think I have made the case for floating solar.