So belt that is on is Dayco, I had a continental as a spare which seems slightly wider and shorter.. although measurement on the belt is the same. Gave the pulley a wobble and seems fine, only thing I’d say is when I turn the pulley in one direction it’s smooth and in the other direction it ‘clicks’. Cleaned the pulley and put new belt on and seems to be fine.. no squeak! Could the clicking mean pump is on its way out?