So - reporting back from VW Newbridge:
I did the online check-in so was a bit surprised when I got to reception to be told to sit and wait for somebody ot see me. I didn't have time so just dumped the keys and told the receptionist that I was sure they would know what to do.
Got a very helpful call from them later in the day just to check exactly what was to be done. I authorised a change of brake fluid (not covered by the all-in scheme) at £69.
Another phone call today - van passed the MOT no advisories. Tyres were wearing a bit unevenly and they suggested I take it to a specialist to check the alignment before buying new tyres, but that the existing tyres had many miles left on them.
They are checking that the squeaky tensioner pulley is under warranty - sounded like it will be - and that I could either leave the van while they get parts or bring the van back later. Opted to bring it back later as I want it this weekend.
So no extras, nothing out of warranty, experience so far all good.