No idea cos I've never had it apart..Has yours got the release bearing built into the gearbox bell housing ?
I was doing it before I wentOh was you in water up in wales??
If you parked it up it(not used it for a week) could just be a bit of rust on the main shaft not allowing the clutch plate to float back
I was going to say, no wonder it's chattering if all those bits have fallen out.While I’m bored...
You can remover the inspection bung & have a look. Can’t remember if you have to remove the selector bracket(think 4 bolts)
View attachment 219234
(Pictures Are off the net & not my shed floor)