Queen of the Castle: Clodagh McKenna on country life with Downton heir Harry Herbert and dancing with Mick Jagger

A popular song from the late 1920s goes: "I've danced with a man who's danced with a girl who's danced with the Prince of Wales." Last Christmas, Clodagh McKenna, whose boyfriend's late father was the 7th Earl of Carnarvon, Lord Porchester, went to a private party in London and danced with a Rolling Stone.