Thanks for all of your helpful comments.
I have queried the £299 quote from my VW dealership and they attempted to justify it, by saying the job involves a long test run and around 2 hrs labour, involving checking all of the steering components. Wow, are they now charging £150 per hour?
Anyway, I told them thanks but no thanks and I have now booked my car into a local tracking and suspension specialist, who come highly recommended and significantly cheaper. They have all of the latest alignment and ADAS kit on their premises, too. Their prices start at around £80, depending on what needs done, which seems a lot more reasonable than the main dealers.
As some on here have said, the dealership quote was a real rip off and I bet they don't even do the job in-house.