Bought new washer bottle connector (70p) and took the Jag to the Peterborough F1 Autocentre to get the tracking sorted out. I find the lads at F1 helpful and interested in the old car. They took time to explain how all the laser gizmos work and how my front wheel alignment was about ten degrees out.
They also pointed out a perished steering rack boot that will cause it to fail its MoT in February if not replaced. It's the nearside one. I bought a pair when the offside failed last year, so I need to fit the other one before the test. For about £30, F1 adjusts the wheel alignment and will check and re-set it within six weeks. Perfect.