Any height restrictions on these two lights, on the rear panel?

I was planning to put them approx 50mm below rear top rail, in order to avoid fouling back of fuel tank.

This should answer your question
Rescued attachment 2Lighting-Back.jpg

Spot on, Stuart!! Thanks for very clear info.

So, I was OK to put fog and reverse up high - except for one parameter.

Fog has to be 100mm MIN spaced from rear light (as you showed).

Guess I'll have to fix the rear light assys first.