Must be my lucky day, got my V5 back with 'Motor caravan' body type! Had to add more graphics than I wanted (but pleased with result anyway). Sent 22 photos in, with description on the back and labels on the front showing exact wording of DVLA requirements i.e. 'motor caravan style graphics' etc. Put a simple awning rail on and attached a 'sun canopy' to it. Think the Seitz windows must also have a bearing on their decision? Hey presto, just over a week later, V5 came back with Motor caravan classification.