. It worked!  Took a 30 mile ride today and no more noise!  Tightening the spokes and adjusting the brakes resolved the issue.   Thanks to the forum for the answer

I tightened the spokes and also adjusted the inner brake pad as I heard a high pitch squeal. It was raining here today but I rode it up and down my street and did not hear the noise as before.  I will have a longer ride this week, but it appears I have solved the problem.  Thanks so much all who contributed.

I did find a few loose spokes but was sold the wrong size wrench so will return the wrench and get a 4.4mm one and report back if this solves the problem.

Thanks I will look into that

I have a 2020 Rad City with a noise I can't diagnose. It is a cyclical noise from the rear. It is there all the time while riding and not associated with pedaling.  I applied light braking and it still occurs. I put the bike on a rack and it is not heard with the motor turning with or without pedal turning.  Only seems to happen with my weight on it when riding.  I don't see any obvious clearance with the rear fender, but sounds like something is rubbing somewhere!  Any advice appreciated.