Thanks for the replies, nice to feel welcome.
Found this a very handy site so far. Already changed the pollen (cabin) filter. Was getting a musty smell from the aircon. This seems to have fixed it.
One thing though, it didn't seem mega dirty and I think it was changed at the last service, however the airflow indicating arrow was pointing towards the engine bay and not into the car?
Does this seem right? I fitted the new one with the arrow pointing into the cabin as I would have thought that this is the way that the air is supposed to flow!
Could be wrong but to me the aircon seems better now and the flow, especially while idling, seems improved.
On a different topic, what's the crfack with the clock on my CD player? It's only right twice a day! never keeps the correct time if set to RDS or not.