As I have previously explained in another post my clutch pedal was to high. Anyway the cause of this seems to be the fact that the push rod is not being held in its proper position within the master cylinder. I have now removed the master cylinder from the bulkhead and the pushrod has come completely out. It appears that the master cylinder is a sealed unit so is there any way to get the push rod back in so that it is held into place like it should be?

It's a broken circlip causing your problem, it's unavailable as a lr part, the breakage usually signifies the age, wear and tear of unit so usual cure is new unit, unless of course your feeling mean and like a challenge!!!

I have a feeling that it's going to need replacing but the annoying part about it is that it is not that old. I had to replace it 12 months ago as the previous master cylinder was buggered.

I have found the cause of the problem. The circlip was fine it was the sleeve that it holds in place that was the problem. It has two bent in tabs that stop the push rod from coming out and one of them has snapped.