Anne St Leger, Baroness de Ros it coincided with her mother's death. A greatly desirable bride since her birth, Anne was contracted to marry Lord Ferrers of Groby. He was the eldest son of Thomas Grey, 1st Marquess of Dorset, who had been married to her older half-sister and whose mother was her aunt, King Edward IV's wife Elizabeth Woodville. Queen Elizabeth was determined to secure the Exeter inheritance for her descendants by her first marriage, and in 1483, St Leger was declared heiress to the entire estate of her father by an Act of Parliament. The arrangement, detrimental to the interests of the surviving descendants
Elizabeth Woodville offered the throne and became King Richard III. Edward V, who was no longer king, and his brother Richard, Duke of York, remained in the Tower of London. There are no recorded sightings of them after the summer of 1483. Now referred to as Dame Elizabeth Grey, she and the Duke of Buckingham (a former close ally of Richard III and now probably seeking the throne for himself) now allied themselves with Lady Margaret Stanley (née Beaufort) and espoused the cause of Margaret's son Henry Tudor, a great-great-great-grandson of King Edward III, the closest male heir of the Lancastrian claim