The UK has a massive reliance on Gas, I think last time I did some numbers when I read the energy storage whitepaper (I dunno, 2010?). Take the current UK energy consumption and quadruple it, that's how much gas we're importing for cooking and heating.
I mention this because I think any talk of efficiency saving is missing the point. If you improved efficiency by 100%, we're halfway there.
That's not enough numbers however. 31% Gas is generated for electricity.
> The data covers the UK cold weather event on the 1st March, providing insights into the scale of hourly energy flows through both networks. A peak hourly local gas demand of 214 GW occurred at 6pm on the 1st of March, which compared to peak electrical supply of 53 GW occurring at the same time.
I mention this because I think any talk of efficiency saving is missing the point. If you improved efficiency by 100%, we're halfway there.
Don't forget to replace Gas.