Thanks Guzzle, I think I'll just ask my insurer to use a VW approved bodyshop and hope for the best.
Thanks king monkey, I'm really thankful no-one was outside when it happened, and I often work nights on the weekend leaving around that sort of time so could have ended up trapped between two cars.
Today my neighbour's Audi Q3 has been taken away so I finally got a good look at the damage, actually worse than I initially thought. Enough that I sort of hope it is written off as I'd be concerned about getting rear-ended on the road. I tried to see what the boot well looked like from the inside but the adjustable boot floor has been jammed so far forward I can't get it off to see. It's such a shame as I've come to really love the car the past year and don't fancy the new GTI at all so not sure where I go from here.
https://imgur.com/MhJvd9WThe guy who did it stuck about, and is insured thankfully. Witnesses saw him speeding down the road but apart from that no other evidence so the police don't think they'll make their charge of driving without due care and attention stick. So apart from a hefty insurance bill he's gotten away with it. It's a 30mph speed limit, I think he was probably around the 50mph mark maybe more, but there aren't even any signs he was braking before hitting the wall so I imagine he was on his phone.