Okay so I think I've sorted this - clearly not looking properly at 11pm last night when I was trying to fit it.
If you look at the sixth photo, you can just about see the stud from the mount sticking down, this was resting on the chassis leg...
As far as any authority is concerned it's legit. I had endless problems getting the police to understand that a local TD5 registered as a tdi was most likely a ringer. I had to speak very slowly to explain to them. It took almost a year and...