In my opinion the UK is extremely well positioned geographically for renewables. The main problem right now isn't the technology or the theoretical capacity, it is government policy wherein the UK subsidies fossil fuels heavily, while actually slowing renewable projects and or electric transport[0].
What I find frustrating is that renewables are often only framed around climate change, whereas they are really a national security imperative (as is climate change too, by the way). The UK is too reliant on foreign countries for fossil fuels. The UK could very easily manufacturer wind turbines, but choose not to, then are surprised when international fuel instability and unstable demand wrecks havoc on the country.
You'd think they would have learned something from the current chaos, but the messaging coming out of Whitehall suggests that they're just waiting for the current storm to blow over while not looking over the horizon at how to stop the next time.
[0] https://www.forbes.com/sites/davidrvetter/2020/10/29/uk-spen...