Small Update.
I've been round the van with a wire wheel and removed any obvious surface rust and protected it with Red Oxide primer. I will get the van blasted and painted properly towards the end of the project but I didn't want it getting worse while it was sitting about. It was defiantly starting to deteriorate quickly being back in the UK with a rough paint job than it was sitting in Malta. I'm actually really happy as it was literally just surface rust. There is no damage to the panels at all.