King Charles has arrived at the Castle of Mey, but could he face an encounter with the ghost of ‘The Green Lady’? King Charles spent his childhood at the Castle (the most northerly on mainland Britain), but Princess Margaret preferred to holiday in Mustique rather than ‘mummy’s draughty castle’. Before the Castle of Mey became a treasured royal property, however, it bore witness to a bloody history indeed. While King Charles settles in to the Scottish getaway, there are reports that some staff refuse to venture up to the castle’s top floor. The Castle of Mey is said to be the home of one of the country’s most enduring ghosts.