Small update, I've just bought some genuine LED rear lights off the German eBay, paid £100 delivered which is a bit of a bargain!
Also placed an order with BMW Cotsworld for the adapted wires, interior boot light unit etc so should be good to go by the time the lights arrive from Germany. The car has previously been coded to allow the LEDs so I shouldn't need to again which is handy. I also got a new rear M3 badge, so the rear end will be tidied up nicely once my goodies arrive!
Only bought the cheap aftermarket LEDs originally as I wasn't certain on whether I prefer facelift over non-facelift lights, and they came up locally for £30, so I'm glad to finally replace them. Much prefer LEDs since they've been on the car though, definite upgrade in my mind.
Also just bought some exhaust clamps, again got a bargain, as the usual clamps corrode and are generally crap.
Car is still running smoothly, not had a single issue, I'm even managing to clean it weekly still, which is a pretty big deal for me and my cars!