Sorry Monoboard
Can't help as we haven't used much gas at all in last few years as we cook with the Ramoska and use EHU for hot water boiler & heating.
However I am interested in the replies you get as I would guess even with our minimal usage we might need a refill soon.
I hadn't realised that there was a possible problem until some recent posts about some people struggling getting contracts.
Cheers
MikeT