Esso super is ethanol free as I have a 2 stroke race bike which can't use ethanol otherwise the center sill gets destroyed quicker than the bearings.
From their website...
Esso super unleaded petrol (Synergy Supreme+ Unleaded 97) is ethanol free (except in Devon, Cornwall, the Teesside area and Scotland). We would therefore advise anyone who has concerns about the presence of ethanol in petrol to use Synergy Supreme+ – providing they do not fill up in Devon or Cornwall, the Teesside area or Scotland.