This is happening everywhere, not just at the Mail.
According to the International Business Times:
The Daily Mail owner did not deny claiming tax concessions as “non-dom”, though he insisted this was because his father had lived in France. Lord Rothermere acquired France as his “domicile of birth” upon his birth as his father acquired a French “domicile of choice” by becoming a tax exile in Paris.
Brits might despise Yanks, but Frogs hate us.