Thanks for the responses - . headin for 5 weeks to continent and have 13kg plus 6 kg in gas locker. Locker will not hold two 13 kg so just hoping we will not run out. Will be off site most of the time with only 3 nights planned on a site. BBQ and fridge will probably be in full swing in the slightly warmer climate!!!!
Was thinking if it was legal to carry an extra cylinder in boot - especially in ferry and tunnel I might take one - now not so sure.
Thanks.