Chaps, I have a result, took the fan belt off pushed the alternator away.
Went for my usual bumpy test run, BINGO, not a sound.
Admittedly I was rather worried re the wood, Phew!
Only thing that perturbs me is there does not seem to be any indication of any friction / rubbing. Off to get a slightly shorter belt anyway.
Oh and of course will have to strip the other side down now, to get a matching pair.
Pandy, thanks for the advice re Ear Plugs however I would have then had to distribute to all on the street, as it was rather an embarrassing situation.
I really appreciate all your time.