On my 71 XJ6 parts car donor, it has a tow hitch. I was quite surprised, and searching the forum archives, I only saw 10-20 year old posts discussing tow hitches, with no real pictures still available. Thought I would put up some pictures to show how it was mounted and what the hitch looks like. It mounted to the two large bumper mounting bolts at top sandwiched between the body and the bumper, and then with the two straps sandwiching the trunk (boot) floor under the spare tire. Obviously not a heavy duty hitch and it does not have a square receiver, even the 1.25 light duty size; so the ball mounts at whatever height it is on the car. Not adjustable. But thought this was interesting, and certainly would be unusual here in US to see a Jaguar towing even a small trailer. I would guess this was a homemade hitch and not a factory product, but who knows? No ID info on the hitch as to a mfr for example.
BTW, will be selling this if anyone interested, how about $40. Shipping on your dime will cost more than the part, it’s heavy and it doesn’t break down to a small size. The small extension where the ball mounts is the only part that can unbolt, rest of hitch is all welded construction