in my opinion it needs a complete overall from the ground up!
At the very least it should provide:
Sill height to ground
Sill height to floor
Door width and opening angle
Seat height and seated headroom
Boot Lengh x width x height and boot lip height.
My current vehicle which is classed as a large SUV? shows most of the dimmensions however, it gives boot capacity in bottles of whisky! I moved on to the Nissan Qashqui which was also classed as a large SUV? but, it only gave boot litres and that both vehicles had 5 seats.
Surely if Motibilty don’t know this information or its not availalable on RIDC, it wouldn’t be too dificult to request the vehicle schematic drawing or even send a staff member out to attain the measurements after all they are paid enough. That way it would save me going out with my yard stick!