For some reason my turn signal on lamp - next to the high beam lamp has stopped working? I took the bulb out and it is fine along with the wiring? Any quick fixes i don't know about?

Could be an earth fault, is the flasher relay still working?
From the little I know, if you can clearly see the flasher working from a normal seated position on the bike, an idiot light isn't compulsory for an M.O.T.
Mike