Prince Edward revealed that members of The Firm were “very nervous” that Miss Piggy might gatecrash the royal box during the Coronation Concert. The musical extravaganza, staged at Windsor Castle on Sunday to celebrate King Charles’ Coronation, saw pop stars including Lionel Richie and Katy Perry entertain a crowd of 20,000 spectators, with millions more watching on TV around the world. And just before host Hugh Bonneville introduced the final act of the star-studded event, Take That, Kermit the Frog appeared in the royal box waving a Union flag in front of a grinning Edward.