Good luck to M’Lord Rothermere.
Individuals have an absolute duty to reduce their tax bills to the bare minimum required under the law. Nothing that he has done seems to contravene HMRC rules. If I had the funds that Rothermere has I would do precisely the same. As it happens I do not have such wealth but I do not envy, or denigrate, anybody that has and I applaud their efforts to keep as much of it as they can.
Governments need to learn to manage with less of other people’s money instead of dreaming up ways to give more of it away. I doubt that would alter the philosophy of people like Lord Rothermere (or me) but it might help.