The juddering can't be doing the rest of the car any good, nor your serenity as you drive along. How old are the tyres? If not that old you might be able to get something from Continental. I split the side of a Pirelli motorcycle tyre once, hitting a pothole, along the join between parts of the tyre, the dealer took the matter up with Pirelli and after a while I got a partial refund. Clearly the insulating material is not meant to delaminate, so presumably it is a design or manufacturing defect.
If it were me I would change all the tyres, it's not worth ruining the ride of your RR and your peace of mind just to save a coupe of hundred pounds.
Thanks for posting, the thread is a very useful warning. Only Range Rovers since 1988