stories above the present roof ridge and is supported by two massive corner buttresses on the south-east and north-east faces of the tower, added when the tower was heightened in the 15th century. The lower stories of the tower are 12th century in origin, and the old level of the Norman roof ridge can be seen on the western face. The tower must have been almost invisible before its heightening, as the roof ridge came right up to the top of the Norman work. It was heightened in the 15th century and features two-light boarded belfry windows, an embattled parapet, weathervane and flagpole. The entrance to the tower is in the north nave aisle, where a short spiral staircase leads to the transept roof, and a further staircase ascends the north face of the tower, culminating in a weathervane. Interior The nave arcade is tall, the aisles narrow, and the nave light. There is little remaining stained glass in the nave, much of it was destroyed in the English Civil War. The nave clerestory has corbels that support the fine tie-beam roof, dating from the late 15th century. The aisle roofs are of simple lean-to construction, featuring moulded ribs, bosses and angel corbels. The door to the former rood screen in the nave is still visible above the tower arches, and the corbels supporting the rood screen are visible underneath it. There is an intricately carved Jacobean pulpit in the nave, which stands on a stone base. There is also a 17th-century clerk's desk, and like the pulpit, this is intricately designed. The tower arches at the crossing are slightly bent in their central sections, indicating potential problems with the tower in the past, and the need for the massive supporting buttresses. Underneath the tower is a highly decorative stone fan vault, a hallmark of the Perpendicular Gothic style. The south transept, much like the nave, has little stained glass but does have several monuments, including an excellent 18th-century marble monument with a pediment and a bust. The north transept is mostly occupied by the organ but does have a 19th-century screen, incorporating some 17th century work. The transepts have hagioscopes, to allow those seated in the transepts to see the altar. The chancel is the most richly decorated part of the building, featuring most of the surviving medieval stained glass in the church. The windows have beautiful geometric tracery,