Thanks mate

Tried Vagcom and it came up clear, no faults. So far in the 5 weeks I have owned her I have done.....Oil and oil filter change, new airfilter, new plugs, cleaned out thottle body and cleaned MAF.
Maybe as you say, a boost leak from somewhere as there seems to be sooooo many turbo vac pipes around. I have checked as many as I can and so far they all seem ok. Wonder if I can find somewhere that will do a boost check, or I wonder if it could be something worse like something to do with the Turbo itself?