hello mate,had the same issue with mine a few months ago.not a big job to do.there is only one little bulp that lights it all up,just pull it from the holder and make sure u push the pins in before u pull it.get a new bulp from hallfords-think its about £2 at the most,and get the same one,all details should be on the old bulp
to get to this point u need to remove the cover surrounding the 3 switches by placing a flat screw driver in the sides and pushing it out untill u feel comfortable by pulling it by hand.there will be a screw in all 4 corners,undo them and keep safe.to give u more freedom remove the ashtray and whole piece where it and the lighter goes,there should be 2 screws at the bottom,and all the blanks to be taken out aswell.
then with the switch unit loose play with it-up-down-left-right in no order untill u can get the back accessible,there will be a wire that goes in to a mould,just unplug it,this is where the bulp is located and this all behind the centre switch.unplug the mould and be carefull with those transparent spider like legs that comes from the centre outwards-thats the thing that sends all the light to the different area's
replace the bulp and work ur way back in reverse,if i missed anything,give a shout,done it a while ago so my memory is rusty.
good luck buddy.