Square 3 stage C14 west tower without an entrance.
Towards west end of nave is large and richly ornamented north porch of c.1480 given by Yaxley family, 2 storeys as tall as nave eaves.
Pointed outer arch has a triple order of shafted jambs with brattished caps, outer shafts support spandrels which have reliefs of St. Blaise with a monster and Hercules with the Nemean lion, small dogs are carved on moulding around spandrels.
Parapet has blank shields of arms with cusped scrolled tracery, sawtooth brattishing, octagonal pinnacles with a central winged lion, outer seated figures.
Returns have 2-light Perpendicular windows, hoodmoulds with mask and lion stops, octagonal pinnacles with gargoyles.
Inside porch a groin vault with moulded ribs and tiercerons, bosses with Christ and Virgin to centre, Evangelist symbols and angels, angle colonnettes with crocketed pinnacled capitals.
Original benches on sides, pillar stoup, C19 stained glass.
Chancel: C15 east wall has a 3-light Perpendicular window with cusped ogee headed lights, segmental pointed arch, flanking 2 stage buttresses, shaped kneelers to coped gable parapet with ridge cross, 2 stage buttresses to returns with 2 different 2-light C19 windows to each side, eaves cornice , to south a central low pointed entrance arch from above which springs a C19 flying buttress.
Taller pointed double chamfered chancel arch, C19 foliate capitals, above chancel arch is a C15 3-light window opening into chancel raised in 1868.
C15 3 bay arcade to south aisle, octagonal piers with moulded bases and capitals, double chamfered pointed arches Good 6 bay arched braced collar roof in nave with short king posts, arched braces from king posts to ridge piece, moulded principals, purlins and arched braces, brattished collars, square foliate bosses, some early colouring on purlins over east bay and on wallplates which are thrice brattished with wings of removed angels and coronets over ashlar pieces, angels removed below posts.
South aisle lean-to roof has 3 arched braced rafters, moulded purlin and principals, diamond bosses, brattished cornices, angel head corbels.
C19 chancel roof, 4 bays, arched braces on stone angel corbels.
C15 chancel screen of 5 bays, outer dados divided into 4 panels each with painted figures of Saints, defaced to north, SS Magdalene, Barbara, Dorothy and Cecilia to south, gilded patterned backgrounds, ogee heads to panels with carved spandrels, carved frieze to open upper sections with tracery lost except to central opening which retains cusping, subcusping and crocketing, ornamental cresting to head of screen.
C15 glass all assembled in 1886.
Good hexagonal pulpit to north east of nave, 1635 restored 1933, arched panels with strapwork, jewels and gadrooning, shaped brackets to reading board, canted blackboard with text inscribed in arched panels, griffin bracket to tester with initials TF and TD, vine scroll and guilloche, outer arabesques with acorn drops, raised cresting above with date on shield.
Part of similarly carved contemporary clerk's reading desk is incorporated into a low desk to north of pulpit.
Wall painting over chancel arch has remnants of large Doom.
In chancel to north a large late C19 organ with painted pipes by Bevington and Sons, Minton encaustic tiles on chancel floor, C19 poppyheaded bench ends.
In south aisle a C17 Communion table with turned legs.
South aisle west wall hatchments to Rev. S. Leeke, d. 1786, Yaxley hatchments over north door.
C15 glass fragments, nave window heads have some C15 fragments, in south aisle a panel with a figure of St. Katherine.
Late C19 figure in nave to north.