Took my GTi in to Spirit today.
They did the service (14,000 miles).
I also asked them to check out the awful noise when turning the steering wheel at low speed.
It turns out there's a known problem with the steering rack.
Apparently a new rack doesn't fix it.
VW are working on a repair fix, but haven't released it to service yet.
They've also had to order in a new switch for the petrol filler cap - It keeps opening itself!