Frustrating day. The insurer's choice (Autoglass) said I would need to travel to their service centre which is miles away so I rang a few other companies hoping that I could find one that would work from my home (and I'd just suck up the cost provided it was reasonable).
The only company I found who said they'd do it was Auto Windscreens who wanted £218 so I booked it only for them to email me 10 mins later and tell me they'd made a mistake and the actual cost was £580 "due to the vehicle having a driving aid and part only being available from Volkswagen". Presumably the lane assist?
So I cancelled that and still need to figure something out