Some of you may be interested in this press release from the Federation of
British Historic Vehicle Clubs about the introduction of E10 petrol as the
standard 95-octane petrol grade by 1st September 2021 and the retention of E5
petrol to provide protection for owners of older vehicles.

https://www.fbhvc.co.uk/news/article/fbhvc-clarifies-the-introduction-of-e10-petrol-for-historic-vehicle-owners