Must I take my caravan to that brand approved workshop to have an annual service, or can I go to an NCC approved workshop, without compromising the caravan warranty. The reason for my asking is that with the extended water ingress warranty, I feel that I may get a more conscientious damp report from another NCC workshop than I would get from a dealer approved workshop. If there was dampness requiring remedial action then I would have to contact the dealer approved workshop, but I would have the independent report to back up my claim