@Jack 172 do you have one light for your interior light or does it have a map light too?
If it's just a single bulb, it's a 38mm festoon, and a pain in the arse to LED as it only works one way or the other unless you use two bulbs or a bridge rectifier.
If it's got a map light, then it's 2 w5w bulbs, same as your sidelights.
Number plate bulb is an R5W.
I'll put some links up later, I'm not on a computer at the moment.
McGherkin do you know much about bulbs for the mk3? I've gone through no end of numberplate bulbs for mine - any you would recommend?
As promised
Interior light, you'll need 2, and solder them together in opposite polarity using a wire from each end. (Or you could buy the courtesy light unit with a map light, and just use w5w bulbs without doing any soldering - I recommend you do this.)
http://www.ebay.co.uk/itm/like/3209...f11=ICEP3.0.0&ff12=67&ff13=80&ff14=101&ff19=0
Numberplate light.
http://www.ebay.co.uk/itm/Land-Rove...arts_Vehicles_CarParts_SM&hash=item51b5ea1881
@McGherkin do you know much about bulbs for the mk3? I've gone through no end of numberplate bulbs for mine - any you would recommend?
For sidelights i have upgraded - http://www.cliosport.net/forum/showthread.php?727892-2-Pictures-amp-LED-Change
And for my numberplate lamp i have went SMD LED also - http://www.ebay.co.uk/itm/390487767679?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649