I'm a belt and braces person, so I add Redex Lead Replacement, Carb Cleaner and Sta-Bil 360 Marine Ethanol Treatment to a 20 ltr fuel can and fill that up at petrol station with premium petrol. I fill my bike up from that and I make sure I keep the tank full both summer and winter to try and prevent condensation. I've been doing that for a few years now. It only takes a small amount of each additive to add to 20 ltrs, so it doesn't cost a lot, it's no trouble, and it makes me feel I'm giving my A10 the best chance I can to stay reliable and trouble free.
I did hear that when they bring in E10, here in the UK, for 95 octane, 97+ octane premium petrol will stay as E5.