The couple had been in Britain on a brief visit when the queen, Britain's longest reigning monarch, died on Thursday. Like other senior members of the royal family, Harry rushed to be by the queen's side as she deteriorated at Balmoral Castle in Scotland. A spokesperson for the heir to the throne said William had extended an invitation for the Windsor walk. A royal source described it as an important show of unity at an incredibly difficult time for the family. Royal observers had been looking for signs of a detente amid the pomp and ceremony of a period of national mourning and Elizabeth's state funeral.
