Part-ex valuations are being done by British Car Auctions via an email link. I’d originally thought the dealer was quoting a price - I had been told as much by Toyota UK earlier in the year that they’d offer, and would have first refusal if I accepted - but seemingly this is no longer the case.
Because I’d assumed it was still the case, I’d left my keys at the dealer when taking a test drive; when I got back he’d filled in an inspection report and got a couple of online figures based on his appraisal (Auto Trader / Black Book live valuation) but said they were only a guide.
On contacting Toyota UK I was sent a link to BCA which required me to fill in various details about the car, then take a series of photos as guided by the interactive link (you need approx. 2 metres space around the car, and guidelines get you to take photos from various angles including wheels, front and rear seats, dashboard and with an open boot). I did this on Saturday, and on Monday was contacted by Toyota UK with the offer.
All fairly straightforward, but not what I was expecting. I’d imagine if you contact Toyota UK, I’d imagine they’ll send you the link; mine was slightly delayed by them checking whether the dealer had taken the necessary photos - he hadn’t, but his estimate for the part-ex was within £5 of what I was offered, which seemed impressive!