Hi again,
I've just had a quote from Desira for £265 for a P2 service, took the wife's car to John Grose in Lowestoft and asked them.
They contacted Nissan for the P2 schedule, oils etc and came up with a price of £195 which I think I'll probably go for as the work is pretty standard and they all seem to have the same diagnostic kit.
Must say this is the best car I have ever had, I previously had an FTO and a Celica before that. Need a new set of tyres before the next MOT - ouch!