Hi Mr B.Bowen.
When these warning lights come on this is letting you know that the ABS management system has encountered a malfunction with in the system.
You need to get your Jag hooked up to a diagnostic scan tool and check for all malfunction codes .
The ABS and DSC will always come on together and the most common fault for this is the wheel speed sensor .
And not so nice is in second place is the ABS module malfunction, where just inside a solder goes bad and just needs resoldering .this you can remove open up and inspect .if you know of a good TV/Radio repair shop he can test and resolder
this for you.then retry .could say you a fortune if this is your problem.
Any malfunction with in the ABS .Engine ,Transmission system will deactivate the Cruise control.
Need further assistance with this issue then please get back to me with the reply box below .After rating there is no further cost for any other question relating this issue .Kind regards Greg