The (Level 4) survey and detailed building recording of the gatehouse revealed nine broad phases of activity within the extant fabric. The results of the excavation have allowed for a refinement of previous theories on the form and function of the west tower of the gatehouse, which has been demonstrated not to have had access from within the courtyard, the position of an external stair associated with the large western range of the early C14, and possibly of greatest significance, the position of the original west curtain wall, which the excavation clearly demonstrated that it lay further to the west than previously thought.