Another partial success!. The seller wouldn't drop below £14,300 despite the following
1. 2mm on back tyres, 3mm on front
2. brake pads and discs were knackered IMHO
3. P1 service due very soon
I calculate that it needed about £1500 of work
The good points were that the car is still under warranty and in very good condition apart from a bumper scuff and two small dents. There are 3 more people viewing the car at the weekend and the seller is confident of a sale. They will have to have deeper pockets than me.