Thank you.
I think Base Camp are the answer. They seem to be the sort of business where you need to catch the owner on the right day, but 5-quid makes sense where the click-and-buy places £30 does not. I'll wait until work calms down for christmas, telephone calls mid afternoon are a PITA but easy compared to finding a working fax machine.
Having experienced gas (as I believe has Jethro also) there will be no conversion. Having had the Wee over the peaks and discovered no lack of go though, I might go back to carrying the pocket stove and using hexamine/twigs as a back up.
Andy