This incorporated a new nave and chancel with a clerestory, side aisles and chapels to the north and south, a two-storey porch to the south and small vestry to the east. The north chapel is the Lady Chapel, and the south chapel, now known as the Molyneux Chapel, was once the Chantry of St Mary. The vast majority of the church as seen from the south elevation is of new stone dating from this rebuild in the 1530s. However, the east bay of the north aisle uses stonework dating from the 14th century, and the west bay from the 15th century, suggesting that much of the masonry of the earlier structure was incorporated into the new Tudor building. The smaller windows, rough joint with the tower, lack of embattled parapets, and large sections of arch mouldings which make up the North wall all suggest that this was the case. Within the chancel, a 15th-century sedilia and piscina in a four-arch arcade, and an ogee-arched aumbry are located to the South of the altar and predate the current structure. Some time in the late 16th century, a range of typically Elizabethan, rectilinear windows in the late Perpendicular style were installed along the south aisle, flooding the church interior with light. They are plain but contain fragments of pre-Reformation glass set into leaded panels. Decoration Tudor and Jacobean The most striking aspect of the church's interior is the complex of seven screens dating to the early to mid 16th century, when the current church was built. They are described by Pollard and Pevsner as the church's "great glory" with the chancel screen forming "the magnificent centrepiece of the whole church". They are richly carved with Gothic and Renaissance motifs, the latter including friezes with putti. The wooden stalls in the chancel and twenty six rows of pews lining the nave were carved especially for Sefton, and date to around 1590. They are richly carved and noteworthy in that they display only secular motifs: unusual given their setting and purpose. They are oak in construction and carry a distinctive poppy head finial, fashionable in the 16th century, atop their ends which each display a single letter of the alphabet in Gaelic script. The pulpit is Jacobean carved wood and dates to 1635. It retains its backplate and sounding-board, and is richly covered in intricately carved Arabesque decoration. A large, 14th-century muniment chest, four