Clutch fitted today and much better, smoother take up and better gear shifting. Also the bite point is lower down so no need for the extended clutch stop rubber that l fitted last year.
They showed me the old clutch which they said was about 60% worn, so it was not worn out. They said the diaphragm springs can "become weak" causing the clutch to be less positive.
Anyway, it's much better now, although the bill was nearer £500 than the £350 they quoted.