Thanks Ray.
Lets take this in bits, unlike Doug King who seems to have amalgamated several things into one.
First, the van must have a Dometic fridge
That is quite understandable, after all Dometic are not going to warrant any other make.
Secondly,all the stuff about being in an owners club, attending the factory visit etc etc.
I am pretty certain that this ONLY applies if owners wish to take advantage of a free service on the fridge by Dometic Engineers.
I do not think it precludes everyone else from the three year warranty, just the usual stipulation thatif you want the fridge serviced it will be an additional costing, but remember that to maintain warranty on Dometic and Thetford fridges, the burner MUST be serviced each year with it being removed, cleaned and replaced.
I will check on Monday to make sure I have got it right.