We up-plated our van (Premium Van 65GE) in July 2014 from 3500kg to 4000kg. I completed Form VTG 10 and sent pictures of the metal plate in the engine bay that had the figures: 4000 kg, 5850kg, (1) 1850kg and (2) 2200kg stamped on it. It took about a week – cost me £15. I also had to send in the V5c reg document duly amended under Section 7. New form is probably a bit different. I even received a refund of road tax!