Thanks for helping with this, I popped into my garage this morning for something else and mentioned it and he said it looked like the bulb was the wrong way around. He was right and I fixed it earlier.
Not that I know of, I have had someone check with it parked up and all the lights on and it all looks normal. The fog and reverse lights look right. I did have a bloke flashing me down the motorway last week (I wasn't braking) but I got home and checked it andthe rest all looks normal so I am presuming he just wanted me to pull over so he could mug me.