In the short run, one can create a liability limiting non-profit corporation that distributes books in the UK. Said corporation would assume all liability, purchase books, pay royalty to the copyright owner, lease space on bookstore shelves, and own the books until purchased by the end user.

Then the Saudi mouthpiece would have less motivation to sue, in that there are no profits.

At least as valid a legal fiction as the legendary tussle over land lease and occupation between John Doe and Richard Roe.