Guess i should have checked to see if it was a fuse first but 3 hours later and the dash is half out...the bulb is okay so some testing tomorrow, good time to trim the dash and sort some of the dodgy connections out though, all needs doing
It's unlikely to be a fuse, especially if you haven't noticed anything else not working. My money would be on the alternator brushes, but it could be a bad earth or faulty regulator.