Originally Posted by Mike198

OK Guys here's the result; belt changed - chirp/squeek gone.

My independent Jagiar specialist reported that the old belt was in good condition, so that is now in the boot/trunk as a spare. Secondly the pulley bearings are in excellent condition but the running surfaces were highly polished and that was the cause of the noise. Apparently he, very carefully, applied some emery paper whilst rotating to roughen up the surface. Job done in one hour; local dealer needed the car all day and wanted silly money.

Thanks to all that replied to my initial question.
Mike