Wow abit time consuming doing all this separation palaver and travelling long distances just to find an Esso garage that does non ethanol.
I have been running 91 UL for the last 4 years on all my classic bikes , yes it costs 25p more then the top fuel premium rubbish you get but it doesn't go off and doesn't have all the crap inside it especially ethanol. So get a 20ltr jerry can and fill up at your local airfield. Job done and relax .
E-10 doesn't seem to be much of a problem for engines that are always in use. The problems come when the bike has been standing unused for more than around 6 weeks. And the worst issue (besides fiberglass tanks melting) is how it attacks the carb. I'm as cheap as they come and I've had to toss quite a few carbs.