William,

I use whatever is available. In my experience the cheaper GO gas is less hot than the others, longer to boil and uses up faster, MSR and Coleman's are my go to. Never used Jetboil - my local shops don’t stock it.

I would definitely put the gas canister in the sleeping bag for 30min or so before using it - definitely improves performance.

I’d not even noticed that the description is different, all modern gas cylinders are butane/ propane mix, I’ve seen them with a higher proportion of propane, but they cost more and aren’t necessary for May in Scotland.

Thanks to all

I will get one in London in the few hours I have there before getting the train.

Hope to See you along the way.

William :flag-bb: