With a POD that Edward III and his son refuse to intervene in the Castillian succession crisis of the 1360's, what is the impact on England if Edward the 'Black Prince" remains healthy and vigorous and lives to a normal medieval lifespan of 60, dying in 1390 instead of 1376. This means that he becomes Edward IV and his son, Richard of Bordeaux, benefits from the tutilege of a vigorous and capable father before becoming King as an adult in 1390.