I had a call from Andy today. It appears that the carpet suppliers have gone bust and are in the process of being taken over. The upshot of this is that the new carpet people are quoting 12 weeks until they get everything sorted. The trimmers have offered him an alternative but he thinks the colour is wrong and it's a bit bathroomy.
After talking with him I have decided to wait the 12 weeks and will either fit the carpets at a later date or fit some cheapo stuff until they are ready.