Whip the 4 screws out of the bezel surrounding the radio. Take the 2 screws out of the top of the heater control panel and pull the panel forward (there are 2 clips at the bottom) unhook the cables or just work close to the dash. There are 5 bulbs which you buy complete with the holder. I think Halfords or most good spares shops have them but if not a good motor factor certainly will.