Originally Posted by geraldandannie
Are they refillable bottles?
Most probably not. If the MH were equipped with (user-)refillable bottles, then this would certainly have been said so in the ad. This is because re-fillable bottles - which must be firmly attached to the vehicle in Germany - are significantly more expensive than standard bottles.
The standard German gas bottles with a grey(ish) colour can only be refilled at certified filling stations operated by qualified staff. They are distributed via an exchange system: Users bring empty bottles to the dealer and exchange them against full ones, paying only the price for the content which includes a service/handling charge. The advantage of this system is that one filling station can server multiple outlets, like DIY stores, petrol stations etc. However, unlike in some other exchange systems, the bottles become property of the user, so there is no obligation to refund the bottle price if someone wants to leave the system.
Standard German bottles are also exchanged in Netherlands, Belgium and Austria, but nowhere else.
My recommendation to Bob's friend would be to take over the van without gas bottles, then driving it back home and have it retrofitted with UK bottles. Or, at least, only take one German bottle and not two.