Finally after changing the TPMS sensors on the insistence from my Jag dealer that it would cure the problem of the dash warning light coming on the problem has been solved by changing the control module. Changing the sensors didn't work so the dealer took the car back in and then checked all the wiring and after having the car a week replaced the control module. Thankfully I am not paying for the 20hrs spent finding the problem. I told them at the outset that I had been advised on this site that the module was the problem but would they listen.
Just thought I would let you all know that yet again the advice on this site is worth taking nore of. Shame the dealer didn't, they could have saved themselves a lot of cost and time.

 

Good to hear you got the problem fixed AND the dealer took the hit on the (unneccessary) investigation work.

Graham