I am in no way affiliated with JLR London. I am just a happy customer. Picked up a brand new F Type 2 months ago and it had minor issues, all which the dealership took care of promptly and diligently. They always accommodated my schedule, provided loaners instead of shuttles (which was fun because I got to drive almost all the JLR models) and swapped cars with me - even from home!
I cannot ask for better service from a dealership. They do not look at you as unreasonable unlike other dealerships - they take the time to resolve the problem and actually work with you (if you provide info regarding your problem from forums etc.). It's all very personable.
Personally, they can service all kinds of makes - I would recommend them to anyone I know.