Finally got the crankshaft pulley replaced.
Was badly damaged, although there was little sign initially of damage. This was the source of the occasional smoke.
Tried to upload a picture of the failed pulley, but failed. File too big ?
Also replaced the top anti-vibration engine mount (which was previously known to have been badly perished), and the services belt, as a precaution, and fitted the front springs puncture protection kit.
I wait to see if that is the end of the incident.
Just got the PAS pump gasket to be replaced.
If anybody wants a replacement gasket, I have a few spare.
Ho, humm, this is becoming expensive, and it's MOT time soon !!!
Good job, Lenny is up to the task.