Hi All, I wanted to give you all an update on how this ended. Initially the dealer agreed to an independent engineer giving the van the all clear at his expense. Days later he changed his mind and after 'heated' phone call from his side offered us our deposit back which we have accepted. We have now bought another motorhome, so it all turned out good in the end. Thank you all for your advice. I also contacted the CMC legal who were also super helpful and gave very similar advice as given on this forum. Happy camping all. 🙂