Spend the money on efficiency, houses, or a power station
If you took the £11bn, and at a conservative cost of £5,000 to put in a new efficienct condensing gas Boiler and replace windows... that's around 2.2m houses with real efficiency gains, as opposed to a meter telling you some subjective stats on your usage.
Or £11bn towards another nuclear power station...
...or just build some damn fucking vanilla council houses, that people arre allowed to buy, and the sale money used to build more.