Richard hurried back from Ireland to Wales to deal with Bolingbroke but he was arrested by Henry Percy, 1st Earl of Northumberland, as he was on his way from Conwy Castle to meet Bolingbroke at Flint Castle supposedly to discuss the restitution of Henry's lands.
Richard skyndte sig tilbage fra Irland til Wales for at tage sig af Bolingbroke, men han blev arresteret af Henry Percy, 1. jarl af Northumberland på vej fra Conwy Castle til sit møde med Bolingbroke ved Flint Castle, hvor han skulle diskutere tilbageleveringen af Henriks landområder.