We went out and got supplies (supplies!), and I stuck a few strips of asphalt roof sealant to the inside of the van's door - the idea is that this changes the resonant frequency of the panel, and should make the van a little quieter. I'm going to play with this and probably try it on the rest of the panels as and when I have to do something to them. I sealed the edges with metal tape, so that if it gets hot, it won't droop down. Having done that, I buttoned the door up again.
In the evening we watched "Thale" - an odd Norwegian movie that was obviously dubbed by people who were really, really bored by the time they got to the final take :o)