Seems to be fixed now!

I removed the rear cluster as outlined in this guide

(
http://www.mr2oc.co.uk/know-your-2-know ... bartid=218
) and gave the connectors a good clean.

Reassembled and the problem appears to have gone away.

I feel like this is one of those little gremlins that if it does come back will come back at a most inopportune moments ie whilst driving past the fuzz.

But for now its ok!

Upon fiddling in the boot/rear light area I did notice that the spoiler fixing bolts were letting in water so I sealed those up with some black silicone sealer

(same stuff I used to repair the roof).

Again only time will tell if that has solved the leaky boot but fingers crossed and thanks for your input guys