Prince Harry’s occasional visits to Britain are regarded by many with the sense of unease that most people reserve for unexpected tax bills, visits from distant relatives and Jehovah’s Witnesses turning up on the doorstep on Sunday mornings. It would seem that his father feels rather similar about the prospect of seeing his errant son, and it has been briefed that, although Harry is in London to celebrate the tenth anniversary of the Invictus Games, there will be no meeting between Charles and the Duke of Sussex on this occasion, despite or perhaps because of the recent good news that...