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.
George Plantagenet, 1st Duke of Clarence became King of England as Edward IV. In that year George was made Duke of Clarence and invested as a Knight of the Garter, and in 1462 Clarence received the Honour of Richmond, a lifetime grant, but without the peerage title of Earl of Richmond. Despite his youth, he was appointed as Lord Lieutenant of Ireland in the same year. Having been mentioned as a possible husband for Mary, daughter of Charles the Bold, Clarence came under the influence of his first cousin Richard Neville, Earl of Warwick, and in July 1469 was married in Église Notre-Dame de Calais to