I am afraid I have finished my attempts to keep or salvage the van, though I think it will be auctioned as-is from the below auction company, and it could be sold for almost nothing. When it was trailed away, it still had a 2018 battery, this year's rear shocks, (cheap) SD-card radio, speakers, 4 x alloy Speedline wheels plus good tyres and fire extinguisher.
Copart salvage online auction site lot number 49711189 (my van) should be displayed soon (Monday earliest I expect, but could be a couple of weeks if they wait for the V5C to change hands via DVLA) - see the website
https://www.copart.co.uk/lotSearchResults/?free=true&query=49711189 .
To bid you have to register, supply ID proof and pay £60 for 14-15 months membership (up to Dec next year). Obviously the auctions are mainly used by dealers who use the auctions there regularly. This is the Westbury, Wiltshire Copart facility. I have checked the fees that Copart charge (and they are very good at it!); looks like a bid of £10 will result in your cost of about £150 if you collect the van, including the above registration.
On the website look at the Auctions tab, Auction Calendar, then locate the Westbury dates; the next one is next friday (25th), but it may be some time before my van appears in the list.
If you end up buying this, let me know and I'll send the service history so that you know what you've got, and a few spares your way.