Plain chancel parapet has large winged gargoyles, and above the east window is a head of William of Wykeham and the arms of New College
Rubble transepts retain C13 clasping buttresses and moulded strings, but have large 4-light C13 windows with restored geometrical tracery
both have tall C15 paired clerestory windows, arched on the south transept and square-headed on the north
C14 porches have simpler friezes and wave-moulded entrance arches
Nave clerestory has 3-light C15 windows with pointed-segmental arches
Early-C14 tower, of 4 unequal stages with diagonal buttresses, has a wave-moulded west door below a 3-light window with intersecting uncusped tracery, and has similar openings in the tall bell-chamber stage
Interior: chancel retains fine carved corbels and head-stops of bishops and kings, and has a restored 3-seat sedilia, piscina and reredos of great elaboration and quality
Chancel roof is Cl9 in C15 style
north transept has a C13 aumbry with a cusped head
2-bay late-C14 arcades opening from transepts to aisles have slender moulded columns, set diagonally, and capitals with male and female heads, some linking arms as at Bloxham and Hanwell Churches (q.v.). Both aisles have a tomb recess, that to north probably a restoration
C15 roof of nave has 8 king-post trusses with cusped and moulded arched braces rising from wall posts, and with further cusped bracing extending in 4 directions from the kingposts
Panelled font in Perpendicular style of 1831 by John Plowman
Oak fittings are C19 except for a fine traceried C15 rood screen, restored and given an elaborate roof loft by Gilbert Scott, and some C17 panelling in the transepts from former box pews
Chancel fittings include return stalls with misericord seats, and an organ case by Gilbert Scott
Monuments include a brass to Jane Smith (d.1508) and a painted wooden memorial to Thomas More (d,1586). Stained glass includes armorial glass of 1834 by Willement