As a result, in 1209, William was forced to send Margaret and her younger sister Isabella as hostages; they were imprisoned at Corfe Castle along with Eleanor, Fair Maid of Brittany,[2] who had been under house arrest to prevent her claim on England.
Part of this arrangement was reflected in the Magna Carta, which promised to deal with the rights of Alexander and his family.
[5][6] At the time of their marriage, Hubert was effectively the regent of the Kingdom of England[7] since Henry III was too young to carry out the duties of king.
From her birth to her death, Margaret was arguably either the first or second heir to the throne of the Kingdom of Scotland as one of the few living, legitimate descendants of William I.
However, cognatic primogeniture was not yet the norm in Scotland and more distant relatives could well claim the throne, as they in fact did in the succession crisis of 1290 to 1292.