We had ours insured under competition car cover too, no problems. Though we are now selling it so will be cancelling the insurance soon. Let me know if you are after a 2 car transport truck/home!
Go cereful you don't exceed your weight limit. By the time youve put a hydraulic lift on the back. All your kit, a car and occupants. Etc you will be close if not over the 7.5 tonnes
Stevenage Insurance did mine £400 with no bonus. they are specialists.
I'm selling my 7.5T race truck if you're interested, It's a 1992 Renault Midliner - all decked out with tyre/tool racks etc - it's a sleeper cab too......£7,500??? PM me if interested
I have mine on a classic policy, it's over 15 years old. Footman James, I think, just over £100. Interestingly I also bought a bigger lorry and they only wanted £15 to add it to the policy.