Hi John, you could cover most gas problems,but I think you will have to put your hand in your pocket - not very deep though.
All the following adapters and fittings if you do not have them are available from GASLOW.
1) Buy BP Gas Light (1 bottle) and use the 27mm adapter, and as Lutz has said BP Light is available in many European countries. The 27mm adapter also fits the French "Le Cube" bottles and some Portuguese bottles.
2) Buy a Camping Gaz adapter. Camping gaz availabe throughout Europe and a good standby. Take a empty bottle, our recycle centre always have them for a couple of quid.
3)Buy a 20mm adapter - will fit Elf, Twiny and Malice bottles in France.
4)Buy Jumbo Gas adapter to fit Spanish and Portuguese bottles via Butane hose.
Hope this helps.JTS.