This year’s guest stars...
Call the Midwife star Emerald (who played Nurse Patsy mount) is Lord Byron’s daughter, Lady ada Lovelace.
The New Tricks star and uncle of Ewan mcgregor, plays the duke of atholl, who welcomes the royals to the Highlands.
The Line of Duty favourite is dr Robert Traill, who campaigned vigorously on behalf of those who suffered in the Irish potato famine.
The acclaimed French actor plays the role of
King Louis Philippe.