Hi Hels,
Yes, take him to see Nigel (Belgrove) at Cromwells.? As Lynn said, it's around the ?100 mark for the complete bloods but you'll get the results back within 24 hours at the hospital and you'll feel a whole lot better then.
To put everyone's mind at ease re the co-ordinator at Hels' CP, she is a lovely girl who is very, very unwell herself in many ways, holds down a full time job (is single...so no-one to help her at home) and works extremely hard for the cats.
Just thought I would say that because it's true and I wouldn't like anyone to feel badly about her.
Best wishes,
Roz