Unfortunately this is when i realised the complimentary VW assist is only for one year.

So after joining the RAC they quickly came out. Initially they tried the diagnostics port, then some electrical testing and finally resorted to taking a hammer to the fuel pump

To cut the rest of the story short, the car was in the workshop for a week and needed a new fuel pump, injectors and a catalyst. Hate to think what the bill would have been if out of warranty.
Apparently one of the injectors was stuck open so when the new fuel pump was fitted the engine spewed neat fuel out of the exhaust system all over the workshop.

All is well now, seems to be running better than it has been for a while. Now have 40000 on the clock after 26 months of ownership and still love the car when opening the taps up even in standard tune it is a lot of fun.
Hopefully none of you suffer the same problems, if anything it is just a warning to top up your VW assistance once the initial year has completed. Also reminds me why i stick to cars with a warranty.
Happy Motoring.