Shortly before the confrontation at Ludford Bridge, Trollope sailed for England with Richard Neville, 16th Earl of Warwick known as (the "Kingmaker"). At the Rout of Ludford Bridge Trollope commanded part of the Yorkist army of Richard of York, 3rd Duke of York, but he defected to King Henry VI's side bringing with him 600 men and "valuable intelligence" regarding York's army.