The exterior of the hall, as seen from the plain, presents an imposing appearance, chiefly owing to the fine effect of its long range of clerestory windows, of which there are fourteen on each side. The five westernmost windows on the south side are each of three lights, of decorated character, being of earlier date than any of the other windows. The sixth or easternmost window is of four lights, perpendicular in style. On the north side are six beautiful perpendicular windows of four lights, probably the most elegant in style in the eastern counties. The principal entrance is through the new porch on the south-west, which is similar in style to the original building. A large entrance door is provided in the centre of the west front, and above this there is a large and beautiful five-light window, producing a fine effect in the interior of the hall. The interior consists of a nave, 124 feet by 32 feet; and north and south aisles, 124 feet by 16 feet, each being divided from the nave by six lofty and handsomely-moulded stone columns, supporting seven elegant stone arches. Above these arches are the clerestory windows, fourteen on each side, perpendicular in style, and somewhat later in character than the other windows. The roof, which is of chestnut, is of hammer-beam construction, with moulded spandrel brackets and circular shafts. From the hammer-beams spring moulded arch ribs. The rafters, which were originally visible, are plastered on the underside, giving the effect of panelling; the ground-work being intense blue with gilded stars. The hollows in the whole of the timber are coloured vermillion, and gilded pateræ are inserted within these hollows at stated distances. The circular ribs are finished with a bead on the underside, which is decorated by spiral bands, alternately drab and oak colours. The intersection of the main timbers at the apex of the roof is distinguished by carved bosses, richly gilt. The aisle roofs are similarly decorated, but without the gilded pateræ. At the east end the orchestra is placed within a recess, under a fine deeply-moulded stone arch, of large size.