Interesting story that added flavour to the negotiations
The service history was incomplete and resulted in me pushing back on them. My final offer was free inspection 2 now, and written confirmation from BMW themselves (not Sytner) that the warranty would be honoured. I have that commitment from BMW that once Sytner have validated with them that an Inspection II has been carried out they will confirm in writing that the warranty is intact. Also got a years road tax, refund of the 12 months tax on the Alpina.
The cost to change price is close to my initial offer (very close indeed) and means I won't have to spend the money renewing the warranty on #69. Given the cost of an inspection 2 and tax, I'm really really happy with the deal. It's all subject to visual inspection and test drive but otherwise... SOLD!