> That looks like rationing.
You've drawn the wrong premise from the data you've looked at. There is no rationing.
UK electricity prices operate in a broken market where the price is fixed to the most expensive on-stream generator in that moment, so in the auction of wholesale prices that happens dozens of times a day, if a single gas generator is online, everyone is setting the price around gas generation even if most of the supply is much cheaper wind.
Last week the PM announced that this broken market should get fixed in the next parliamentary session, because he - and his party - know that reducing energy prices has material impact on how people feel about the economy.
You should also understand that demand has changed shape considerably in the last 50 years.
There's been a pretty devastating deindustrialisation in the UK since the 1970s - there's only one steel forge left operating, and that required nationalisation this year, for example. As the UK moved to a knowledge economy, we found that most of the workforce moved to needing nothing more than a laptop to add to GDP.
But the home has also changed shape: you can't buy an old fashioned light bulb any more, so dreary wet winters are illuminated exclusively by LED lighting at ~10% the power consumption used in the 1970s. Heatpumps have replaced storage heaters, and while electric cars are popular even they do not use as much energy as the factories and ship yards used to.
There is literally just less demand. And the pricing is pegged to gas, unfairly. If that market breaks, I doubt consumption would go up, but maybe new industrial opportunities would open up - if we end up with cheap, abundant energy as a result, we might attract more energy-intensive industry to the UK, but I don't think it's fair to define current state as "rationing"