Thanks for the links, it looks like a right bummer which I pretty much suspected. But I'm pretty sure it is the switch that is dodgy so better dig it out, worth the try as can't take it to MOT with this default.
Will let you know how it goes...
Dear Defenderers,
My reverse light switch has been dead for months, I've been looking at the upfront fuse and it's fine, and tested the bulb and electrical feed, I got no power at all.
I've been looking for the switch below the front middle...