It appears that E10 petrol is being introduced during the summer.
From Gov.UK
During summer 2021, the standard (or ‘Premium’) petrol grade in the UK will become E10.
E10 petrol contains up to 10% renewable ethanol, which is added to reduce CO2 emissions and help tackle climate change.
E10 petrol is compatible with almost all (95%) petrol-powered vehicles on the road today, including all cars built since 2011.
If your vehicle or equipment is not compatible with E10 fuel, you will still be able to use E5 by purchasing the ‘Super’ grade petrol from most filling stations.
I know it will come as a surprise, but the E5 Super grade petrol is expected to be more expensive...
For the full details click on the link below.