An update:
The car went in as a trade in at my local Chrysler dealership in MK on 28th March. all things considered, I think I got a reasonable trade in; certainly a lot better than at other dealers in MK.
Normally I'm used to the idea that when a car goes, you generally don't see it again.

Imagine my surprise then, when going back to the dealers yesterday, to see it right at the front of the forecourt for sale!
It's also in the used car area on the Chrysler web site, at I think £1,000 less than the advertised price on the forecourt...