The two rear panels (either side of the door) have rotten. Water has leaked in over the winter and now the panels have deteriorated so much that I think I could push my finger through the 'skin'.
Try using the search facility on this forum, there have been a couple of threads over the last few years where people have shown how they replaced panels on their campers.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets