Hi Tim, 50% seems to be the usual level of compensation when Jaguar are aware that they had fitted a component [the oil pump] which failed without letting you know. However, I would write a very nice and polite letter to Jaguar, firstly thanking them for their offer, but also saying that you have taken great care of a great car [no pun intended], having the cam belt changed before it was due [105k] , and always using engine oil as recommended etc etc, and wondering if they could up the offer somewhat. Sometimes it works. I had an engine blow on me on the 12th June 1964, when my Triumph T100 suffered an oil pipe fracture. I had another 'bike at the time so I found someone who wanted the frame, wheels etc and more or less gave it him. Good luck Peter.