Or BT Fleet. They are said to provide a good service at a reasonable priceCouncil depots, if they do MOTs, are obliged to offer the service to the public.
They MOT their own vehicles so if they can get a dustbin wagon in the doors they can get a motorhome no matter how big.
I used to take my 32ft 7.5ton RV to Beverley council depot.
The have no incentive to fail it for the repair work...They don't do repairs, but they do charge the full rate....£50 plus.