Sorry I meant to say but was in a rush yesterday. We decided the noise was definatley from the timing belt side rather than aux belt.
Started to remove the top cam pulley cover (plastic)only got it lifted an inch or so and noticed on the side of the cambelt tensioner there was a small bracket with a sharp pointed end which had somehow moved into the edge of the pulley. If your standing at the front of the car looking at the engine the bracket is between the innerwing and the tensioner. Managed to push it out of the way with a large flat head, job done.
As for the air con, tested it and it was fine??? maybe the compressor is getting lazy.
Managed to adjust my handbrake cable up also...result.