Thanks Mark, Very helpful. You may well be right about the tap.
You say "You'll only need to remove the centre console and the trim on the right hand side of the passenger footwell, and probably the glovebox."
Could you give me a few more details about how to attack this. I started but unscrewing parts from the console, the ash tray, fault indicator etc so that I had access to the ventillation controls and behind - but it became obvious I wasn't making progress in the right direction (then it got dark!).
A lot of the side panel/ central console seems to be one piece
Could you possibly list what order things need to be removed in - and some hint at to where the fixings are.
Many thanks for your assistance