to the Club!
Classic clutch failure. Seeing as you have replaced the master cylinder then the next course of action is the slave cylinder which resides inside the gearbox itself. Removal (at least partial) of the 'box is required for access. It is also worth replacing the clutch plates during this procedure as contamination from clutch fluid can happen - most people will recommend this as a matter of course as you might have to replace the clutch plates later at more expense so you might as well get them done now.
One of our members has just done his own slave cylinder and clutch plate change. I'll find the thread...
EDIT: Here it is
http://www.the75andztclub.co.uk/foru...ad.php?t=18467