NO tail lights after towing a caravan

Hi,
I have checked the forum but can't find a solution.
I have towed a caravan from Cornwall to Midlands. After which my tail lights don't work. It was connected to caravan electrics.
The bulbs and fuses are fine. The front sides are also out (same fuse I believe) I've changed bulbs and fuse just in case but still nothing.
Also (maybe unrelated) but my HDC keeps kicking in. I know the switch was temperamental. Any ideas how to permantly disable it?
If anyone has any solutions ieven if temporary to get me home I'd be grateful.
Thanks

Freelander 1.8 2003

Could be the main lighting fuse in the engine bay fuse box if the headlights are not working either.
Do the lights in the instruments and switches work, could be the light switch in the stalk thats faulty.
The HDC might be the wires on the switch come adrift and making contact with each other.

Yup gotta be a fuse

It's a faulty brake pedal switch.....possibly?..............look up three amigos........although I can't remember if this affects the fronts as well