Well to be honest Andy the trouble started when my car went in for a cam belt change, and its quite safe to say i wont be going back there.
The problem is quite strange really, it boosts hard and is very responsive but once it gets above 0.8 bar that's when it starts to miss, strange thing is that when the engine is cold it doesn't happen (not that i boot it when its cold).
i have a apexi AVCr and a Power FC (with commander) so shouldn't be hitting any fuel cut, its been running fine at 1.3 bar all day long till lately.
such a pain in the arse.
cheers Ben