Just in order not to miss anything, the bushing indicated by the arrow (right front wheel) broke, I would also change them on the left but I don’t understand anything about jaguarclassicparts to find the correct code, can some saint help me?
Try this page;
https://parts.jaguarlandroverclassic.com/parts/index/part/id/C01.919.91957.91957273.919572734778/brand/jaguar/
It’s Anti roll bar link CAC9827
Grazie ragazzi!! Without you I’m lost 
I bought in England Delphi parts…
Just as well!
Keep in mind that the ARB will be under tension unless both wheels are on the ground or both wheels are jacked up.
Final tightening usually when the car sits on the ground so the bushing is not twisted at rest and thus lasts longer.