AMD sent the turbo off to Turbo Technics who reported that it was dry, which I guess means that over a long period of time former owners have been turning the engine off as soon as they stop and not letting it cool first, or I was just unlucky.
Anyway, it is being done under the 3rd party warranty that turned out to be with RAC and they will be changing some oil pipes of some description too!
Happy days, I might actually get to drive my car at some point, I've owned it about two months but its been in and out of workshops for coming up to 4 weeks now!!