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.
Richard Neville, 16th Earl of Warwick Lancastrian forces of Queen Margaret and Prince Edward at the Battle of Tewkesbury, where the prince was killed. Soon afterwards, it was reported that King Henry VI had also died in the Tower. With the direct Lancastrian line exterminated, Edward could reign safely until his death in 1483. Warwick's offices were divided between King Edward's brothers George, Duke of Clarence (who had married Warwick's daughter Isabel Neville), and Richard, Duke of Gloucester, the future Richard III (who would marry Warwick's daughter Anne Neville). Clarence received the chamberlainship of England and the lieutenancy of Ireland, while Gloucester was made Admiral of