Thanks a lot for the replies. I thought I'd revisit the CAP because it's been a few years since I sat the RT exam. There are many things I (re)learnt for example reading back "millibars" when the QNH is below 1000 as spekesoftly rightly says. Also things like saying "Descend TO altitude xxxx qnh xxx" as oppose to "Descend FLxxx" (No "TO" when refering to FL)
Just out of interest what do ATC think of the quality of R/T these days? PS I know I need to get a hobby!!!!