Bishop Williamson chose wisely in deciding to major in music rather than Canon Law.
I've often pondered what the Bishop's boyhood dinner table conversations were like when his Dad came home from a long day working at the Zionist Brit retailer. Marks Spencer.

“Whoever summons a bishop before a civil court incurs, by that very fact, an excommunication reserved in a special manner to the Apostolic See.”
Canon 2341 (1917 CIC)