Thanks for your information on this. I am sure it will be useful for others in the same position as you.
the only thing I would give caution to is 'car derived van'. There have been issues where speed limits are lower for certain vehicles, and this can depend on how they have been registered when new. It is not my general area of expertise, but I am aware that some types of vehicle under this classification have a maximum speed of 60 rather than 70. It may also be the case that insurance companies offering van insurance would want clarification on exactly how the vehicle has been registered as this may affect the cover that they provide.