Bringing up an old post but after speaking with BillyMac last night I thought I better investigate if my GT Sport 170 which I bought back in November was part of this faulty batch.
Called the number at the top of this post for VW cust services, registered myself as the currect owner & asked if there was any outstanding issues with my car. Very friendly & helpful girl called Katie advised that my car was affected by the 'Piezo' injector issue & if it had been suffering from poor mpg (36-39) or struggling to start occasionally (which it has) then it was definately affected. She stated that as part of the VW goodwill campaign this would be checked & repaired free of charge & referred me to my local garage. She then called Verve Wishaw to provide authorisation.
My car is booked in with them on the 20th February so will let you all know how I get on just so we can keep this updated & hopefully help other owners.