The UK Government have announced that E10 (10% Ethanol) petrol will become the standard petrol grade in the UK from Summer of 2021. See Government announcement and further information at E10 petrol explained
There is also information on the FBHVC website
The FBHVC have revamped their Fuels information page a lot of details about various aspects of modern fuel, eg ethanol, volatility etc. Well worth a read.