Thanks.

Will do that.

A correction maybe...

Just took it for a drive and noticed that there was no pulling power as I pulled out into a roundabout, turned Air Con OFF and immediately I had more power. As opposed to a "flat spot".

So I tried it a few more times on a straight and at a constant speed and sure enough, turn air con on and car actually slows, turn air con off and car picks up speed; blooming dangerous.

Voltage remains constant (only drops from 14.5V to 13.8V when radiator cooling fan comes on)

Oh, and only 37k on the clock. So that means it was driven by some old granny on short trips most of its life (in fact reading the past MOT docs, one year it did 1k and the next less than 200 miles ! - Surprised the air con still works after such lack of use)