At its completion, the church consisted of an aisled nave of six bays with external buttresses; a squat, square-based tower at the west end; and a curvilinear gable at the east end. Doors stood in the north, south, and east walls and probably in the exterior wall of the tower. Internally, the octagonal pillars may have evoked similar pillars in St Giles'. There were originally galleries on the east, west, and probably north sides to face the pulpit, which stood against the middle south pillar. The church was damaged during its occupation by the English Army under Oliver Cromwell and subsequently repaired. Between 1656 and 1662 a lateral partition wall divided the interior. The galleries were expanded in 1696.