23-03-19, 09:00 PM
Update; got an hour to check the bike today and found an extremely slack chain. It was fitted new a year ago and tightened up at mot time last August. The play was massive and I have no idea why or if this might cause the intermittent squawk. Will be Monday before I get a chance now. The front sprocket I checked as fine also. This was changed at the same time as the chain. Can anyone confirm if a super slack chain could make this noise. Ta