Very expensive electricity...
...is not avoidable.
In case you hadn't noticed, ten years ago the UK was a net energy exporter. North Sea oil and gas were a major revenue generator, for the private sector and the public purse.
UK oil production peaked in 1999 and has declined at 7% per year for a decade. Gas similarly. We are now a net importer of oil, gas, coal and (French nuclear) electricity. This is not cheap, and it is going to get a LOT more expensive. The UK government has a current account deficit of £800Billion, and yet is paying to bail out private banks who are largely owned by foreign shareholders. The banks, previously our other main revenue earner, are on life-support. What little is left of our manufacturing industry (cars, steel, wind turbines) are all being shut down.
The current value of Stirling is unsustainable. It is bound to fall hard soon.
If we don't invest very heavily in renewables, (mostly wind, some tidal) then in ten years a bankrupt UK will be importing 80% of its energy needs using ever more worthless pound notes.
Renewable energy infrastructure may not be cheap, but the wind is free, forever.
Nuclear stations will not be built fast enough to offset the decline in available energy, Without energy we do not have industrial society. The UK has a critical energy crisis.
(Not to mention the global supply peak of oil that happened last year - or climate change!)