Mine was in for it's first service at Inchcape today. I completely forgot to give them the TPI info that Sniffer posted but I listed it for investigation and they've come back with...
"Carried out investigation into creaky suspension and confirmed fault with gaiters on shockers sized from following a test plan. Removed and refitted trim correctly and all tested ok."
From that, I'm not entirely certain what they've done. It's not the clearest job description in the world, is it?
Also had the engine cover off and can confirm that there's no noticeable extra noise. I asked if there was a replacement in the pipeline and they said that they didn't know.
Also found out that I'm not too far away from needing new front tires. I haven't rotated them in the time I have had the car, admittedly, but still didn't expect to be changing them (Goodyears) at 19k miles, to be honest. Frequent tyre changes come with the territory of being a GTI owner, I guess. I could get away with swapping the fronts and rears and will get another couple of months out of them but I have been deliberating sticking some PS4Ss on, so not sure it's worth the hassle.