E10 petrol based fuel will be introduced in September and about a million cars in the UK are anticipated to be unsuitable to use it in. The current E5 petrol/alcohol blend will continue to be available for now, but it may be worth looking into if you have an older vehicle.
There's a list of incompatible cars here: https://www.thesun.co.uk/money/15971...l-fuel-switch/
This list may not be comprehensive.

