I have walked.
The car was advertised as having a full and comprehensive Land Rover Service history. It was about £3k premium to other similar cars so expected it to be as described. That's all. The WIKI has been great to see what should be done. Appreciate there are always options, I want the car that has been pampered.
The dealer has offered to do the missing items but you can't put back the clock. What's done is done.
As others have pointed out, and if wasn't such an expensive car to put right, there are plenty others out there.
Thanks for all the help and advice. The search continues.