Edward IV of England Richard, Duke of Gloucester (later King Richard III of England), were married to Isabel Neville and Anne Neville. Both were daughters of Warwick by Anne Beauchamp and rival heirs to the considerable inheritance of their still-living mother, leading to a dispute between the brothers. In 1478 George was eventually found guilty of plotting against Edward, imprisoned in the Tower of London, and privately executed on 18 February 1478. According to a long-standing tradition, he was "drowned in a butt of Malmsey wine". Edward did not face any further rebellions after his restoration, as the Lancastrian line had virtually been extinguished.
Thomas of Lancaster, 1st Duke of Clarence Bermondsey, Surrey. Thomas of Lancaster, 1st Duke of Clarence Thomas of Lancaster, 1st Duke of Clarence (autumn 1387 – 22 March 1421) was a medieval English prince and soldier, the second son of King Henry IV of England and brother of Henry V. He acted as councillor and aide to both. After the death of his father he participated in the military campaigns of his brother in France during the Hundred Years' War. Heir to the throne in the event of his brother's death, he was left in charge of English forces in France when Henry returned temporarily to England