Oh for goodness sake. I never said "how inadequate Land Rovers are". I'll let you into a little secret, I too run and enjoy an old Land Rover! Yes, lots of it is inadequate, it's not very good on diesel, there's feck all elbow room, it steams up, it's noisy, slow (although much faster than it was when it left the factory) and there's a million other things that aren't very good about it but that's exact reason I bought a 30 year old 110 rather than a Mitsu-yota for goodness sake, because I love Land Rovers. I think most readers of this forum won't take too much offence about pointing out which bits can be improved and the multi million pound industry based on Land Rover upgrades does OK out of it too.
Thank you to all for the comments and suggestions/links, I'll do some reading and decide which way to go. As I mentioned before, I am a fan of LED technology, and I quite like the look of some LED lamps, so whilst I appreciate that I could fit new bulbs etc, I'm keen on the idea of a safe, legal, useable LED solution for a number of reasons. Thanks again.