The UK Government is currently consulting on the introduction of E10 fuel from 2021. The RAC has produced an article which explains some of the ins and outs of E10: https://www.rac.co.uk/drive/advice/emissions/what-is-e10-fuel-and-how-could-it-affect-you/?utm_source=email&utm_medium=email&utm_campaign=CHUB_MEMSIN_A_W1_2020-03-11_160437_11682468&cid=eml-email-CHUB_MEMSIN_A_W1_2020-03-11_160437_11682468-Drive_NL_MEMB_2nd_Feature