Looks like mine hasn't started either. Emailed my dealer who gave me a much more detailed update than expected. See below:
"Hi Andrew,
I have had this supply update sent through for you to view, basically (trying to summarise here) there was a hail storm in Northern Germany at the start of August. This severely damaged thousands of cars that had to be repaired, as a result they used the parts for cars that were already in the build queue (another words yours), I have been told that this delay should not be much more than a week, as per attached sheet.
My apologies for this, I was not aware that something that happened 10 weeks ago was still having an impact as this was not communicated from VW"
He also emailed me a PDF with supplies and lead times from vw which I'll upload later.
Doesn't look like it's going to be massively late