Steve
That's not far off what I'm getting on the GTd at the minute
it's in for MOT and brake fluid at the end of the month and have asked them to look at. It's not been the same since I had the DPF light come on and now it also seems to regenerate more frequently - me thinks they've tweaked it in VCDS.
Having said that, had a good run out yesterday and got near 50 which was a pleasant change.