Quick update, I was going to book her in for an mot today. Good job I didn't.
I decided to swap the rear bulbs from led to standard, because insurance companies are evil in my experience. Wish I bloody hadn't. All lights were working as led's. Now I have only one rear side light, no fog light and no indicators.
Indicators stopped working because I blew the electronic flasher unit up, (says max 30w on it, oops). But the only thing I can think of to stop the rest working would be the earth points, the additional power required to light the standard bulbs is overwhelming a poor earth connection.
Of course none of my old man's multimeters have a battery in, and the bulb has gone on his test light.
This is the part of any build I hate, niggling little faults that take ages of fiddling to rectify.
Oh, and I lost all gears, because one of those stupid c clips decided to jump off the linkage as I was going down the road.
F'ing cars.