early C15 alterations
enlarged mid C15
Lady Chapel c1240, rebuilt mid C15
Chapel of St John the Baptist originally C12 south chancel aisle altered
enlarged mid C14
Trinity Chapel 1430
west tower early C15.
St Catherine's Chapel: east gable has offset angle buttress to north, four-light window with panel tracery with four-centred arch head and hoodmould, north wall has four three-light clerestory windows with Tudor arch heads.
Lady Chapel: east gable has offset angle buttresses to north, five-light window with panel tracery with depressed arch head and hoodmould, embattled parapet with blind tracery and crocketed finials, north wall rebuilt c1820 except east window has four three-light pointed windows with panel tracery, to east renewed, largely blocked and different pattern tracery, moulded string with gargoyles and parapet continued from east wall.
Trinity Chapel: east gable wall has one five-light window with panel tracery with Tudor arch head, plinth with moulded top, north east angle buttress continued above embattled parapet with blind tracery as crocketed finial, north wall has four four-light pointed windows with panel tracery and hoodmoulds, plinth with moulded top and offset buttresses continued above embattled parapet with blind tracery as crocketed finials.
octagonal stair turrets to north east and northwest each linked to body of porch at first floor by single-bay bridges with three-light window with panel tracery and square head with embattled parapet with pointed arch beneath to east and west doors to porch in four-centred arch openings, to west pair of panelled doors with date and initials 1635 MS IH
Sanctuary has carved stone reredos by Scott
north wall has early C20 round-headed doorway into Lady Chapel, remnant of original church and originally external, three bay pointed arcade with hollow mouldings c1450-60 when Chapel extended east on foundation of Chantry of St Catharine and St Nicholas, wall-paintings of this date of St Christopher to north wall and St Catharine to south wall, early C14 wall paintings to west end of north wall
stone fan-vault dated 1508 donated by Abbot John Hakebourne has bosses with his mitre and initials, royal arms and pomegranate for Catharine of Aragon
late C15 oak screen in contemporary four-centred arch on mid C13 bases and lower shafts
sanctuary has reredos of 1905 carved in Oberammergau and painted by William Butchart, communion rails and pavement by Ninian Comper.
Lady Chapel: rebuilt c1450, timber ceiling with carved bosses and corbels
wall paintings to south wall above arcade include Judgement to west
late C15 oak screen in contemporary four-centred arch on mid C13 bases and lower shafts
to west C18 marble font.
Trinity Chapel: constructed from1430, east wall has elaborate reredos with canopied niches, four bay south arcade with piers of four shafts and four hollows surmounted by shield-bearing winged angels and with Yorkist badge of falcon and fetterlock at apex of each moulded pointed opening is echoed to north wall
Nave: rebuilt 1516-30, of six bays with arcade to north and south aisles has tall compound piers with eight shafts with shields borne by demi-angels carrying arms or merchants' marks of contributors to rebuilding, blind traceried panels to east, north and south walls surrounding and below window over chancel arch and below clerestory windows
fan vault and early C17 stone dole-table to entrance, two storeys above rebuilt as single-height room (not inspected) 1831-33.
STAINED GLASS: Medieval glass largely lost since C18, east window of chancel has medieval glass to lower half of three central lights imported from Siddington, otherwise made up, partly from fragments, in late C18 by Samuel Lysons
medieval fragments in each window of Trinity Chapel
early C16 glass to south window of south nave aisle
C19 glass by Hardman.