I haven't done a search, but I am guessing that no-one has looked seriously at fitting a tow bar to a Plus Four?
Whilst I appreciate the dire warnings from the factory and I am sure well meaning souls will warn against voiding insurance and making the car illegal, I still can't help wondering if fitting a towbar is even doable, let's say as an exercise?
I would say yes - you can fit a tow bar. I've stuck them on loads of different stuff in the past, either by welding up brackets, attaching to bumper mounts, or bolted through boot floors or chassis rails etc. There will be something towards the rear that you could make work.
Legally, as you've said, not a chance. Post 1998 (I think) cars have to have a factory spec/homologated tow bar.
