What adaptors are needed for LPG?

[ColinM50]

Bought the Gas-it LPG refillable tank for the M/H and am in the process of fitting it all. At the same time I bought the kit, I bought the French adaptor but since we're now planning on going to Holland via Belgium and the prices of gas are a lot lower in Belgium. To put it in context, LPG in UK is £0.70 a litre, France €0.74, Belgium €0.46 and Luxembourg €0.47, so about half price.

Does anyone know if the French adaptor fits in Holland/Belgium or do I need another one?