William, Kate, Harry and Meghan put Firm above their differences

A source said the decision to extend the olive branch was made by the Prince of Wales, who wished to invite the Duke and Duchess of Sussex to accompany him and the Princess of Wales. He discussed it first with the King, who thought it was an important show of unity.

It was an invitation that the Sussexes, who have been outspoken in their criticism of members of the royal family and palace life, were minded to accept. It meant the walkabout was delayed by about 45 minutes as they got ready.