So, had a call from the dealers. Car's done, dusted, ready for collection... Good and bad news (sort of).
They say noise has gone, nice and quiet... But the air-con is still not as it should be. They replaced the high pressure valve, still the same.
SO... they reckon it's the compressor, they have ordered a new one and will fit it next week.
So I can collect now and start enjoying it.
All in all, I am happy enough as now it will have had a new chain, tensioner and adjuster and also new A/C compressor etc, glad I didn't have to foot the bill.
Now to pick it up..... and start the usual updating/modding....