I got the stage 6 text this morning, so my car is currently in Grimbsy or on its way north. It might tie in quite nicely with the paperwork I've got back from the DVLA for my private plate which is now on retention and I already have the replacement V5 with the random age related number my Audi will get.
Just waiting on the replacement tax disc and then I have 7 days to change the plates over on my Audi, so with any luck my GTI will be at the dealer during the same window and I can just pick it up rather than swapping my plates over and then picking the GTI up a few days later.