I have found the cause of a most annoying squeak and as i am so chuffed that i am that little bit closer to interior driving heaven i thought i would share it with you all in case you are having the same problem.
The little clear plastic spacer fell out from under my door card on the passenger side causing a loud annoying squeak. Having now put some felt there the noise has gone... horray.
Here is a pic of the plastic part that had come loose. Slightly dirty looking bit of plastic sticking out of the black door card was missing on the passenger side.