The sliding door on the side of the van leaks. I woke up to a wet mattress and pillow. It turns out that Ducato’s have a common fault on the door and the quick fix is to remove the top door latch.
I ordered a new one from a seller on ebay for £27 and fitted it yesterday. Problem solved luckily. the door does stick now so I have a bit of jiggling to do no doubt.
[Update] You wouldn’t believe this. I have just been hit by a thunderstorm and the door leaked again. No where near as bad as before but still too much to tolerate. Back to the drawing board….