House of York Warwick himself changed sides, and supported Margaret of Anjou and the king's jealous brother George, Duke of Clarence, in briefly restoring Henry in 1470-71. However, Edward regained his throne, and the House of Lancaster was wiped out with the death of Henry VI himself, in the Tower of London in 1471. In 1478, the continued trouble caused by Clarence led to his execution in the Tower of London; popularly he is thought to have been drowned in a butt of malmsey wine. On Edward's death in 1483, the crown passed to his twelve-year-old son Edward. Edward IV's younger brother Richard,
Malvasia of Malvasia and other "noble grape" varieties on Madeira for the next century. As a result, most non-vintage-dated "Malmsey" was made from the widely grown Tinta Negra Mole or even from fox grape varieties. This changed when Portugal entered the European Union (EU) in 1986; EU regulations required that any wine bearing the name "Malmsey" contain at least 85% Malvasia grapes. Even further confusion results from the fact that vintage-dated Malmseys are often labeled "Malvasia" or "Malvazia", probably because the relatively rare vintage Malvasias were always made with Malvasia grapes even when most non-vintage "Malmsey" came from lesser varieties. Some