Thanks Shaun (Irish sounding name?) I am just south of Brussels, Waterloo. Took my AP valves cylinder to a shop in Brussels that does Nitrox but they told me it was not stamped with "oxygen" on the bottle so they would not fill it

(but they fill my nitrox cylinders that don't have this).
Anyway I think I will get a bottle of O2 and H, problem is I understand you need a prescription to be able to buy medical O2 (something to do with pharmacy monopoly

). Just would like to know how to go about ordering the bottles and who through, welding shop, direct from air liquide etc.
I have whips etc, and will get hold of a booster pump.
Thanks for any help
Joe