Ok so I found the issue.
As I have a large span I fitted Pazzo levers so that the clutch and brake operation would feel more comfortable with the extra span that I could set on them.
However, this extra span, combined with the Oberon slave cylinder caused the end clutch plate to get pushed off the end of the basket. It's worn a groove in the basket but it doesn't appear to be causing an issue at the moment so Ill replace it over the winter.
I have now reduced the span on the lever to stop it happening again.
Cheers
Simon
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