Scotland is a king in Britain.
During the events of Camelot: Season 1 Episode 1 Homecoming played by Fergus Kealy
Morgan, King Lot, Scotland and others arrive with their armies and Morgan tells King Arthur to leave or he will lose everything. Arthur demands their allegiance and respect and Lot has the body of Lot's Outrider brought into the hall and tells Arthur that the Outrider was his eldest son. Arthur's Foster Mother is brought into the hall and Lot stabs her dead. Lot tells Arthur that he has five days or his family and friends will be slaughtered.
During the events of Camelot: Season 1 Episode 2 The Sword and the Crown played by Fergus Kealy
After Arthur pulls the sword from the stone, Lot and Morgan see the beacon fires and Morgan tells Lot that he underestimated Arthur and slaps him. Arthur has his coronation ceremony and during it notices suspicious men in hoods and a battle breaks out. During the battle Scotland is killed.