The overwhelming of Hastings host happens as it does in OTL, but instead of the men under Oxford looting Hastings' men, they remain in order and rejoin the battle spreading word of Hastings death and the fall of the Yorkist left wing. This crushes morale, in the Yorkist host and the added presence of Oxford and his men helps turn the tide in the clash between Montague and Edward, with Oxford and his men shouting to the heavens about the death of Hastings, the Yorkist forces begin to grow tired and broken, smashed between the hammer and the anvil, the Yorkist men. Broken and somewhat disheartened, the men under Gloucester's command capitulate under forced pressure of Warwick and Oxford's hosts. Breaking the Yorkist force and winning the battle of Barnet.
With Gloucester slain and Edward IV captured, the Yorkist campaign for the throne is all but at an end. Margaret of Anjou and her son Edward of Westminster march with their army to take London, Edward IV's sons Edward and Richard are imprisoned in the Tower of London and Edward's father Henry VI is freed from his cell in the tower and reinstated as King.
Henry VI would only survive for about a month more and then would die during his sleep leading to Edward being crowned as King Edward V. The issue of what to do with Edward IV's children as well as fixing the realm after the war continues to dog Edward through most of his early reign, a problem that is only worsened when Princes Edward and Richard go missing from the tower in 1478.