extended in C14, truncated
altered in C16, restored by Frederick Chancellor from 1895.
Flint rubble with dressings of clunch and red brick, the latter partly plastered, roofed with machine-made red clay tiles
The N arcade, except the W bay, was rebuilt in the early C16
the C12 W bay survives.
W belfry and spire C14.
Early in the C16 arches to N and S of the parish altar were inserted, for 2 storeys in the aisles, with large plain openings towards the nave.
internally the wall is splayed back to reveal part of the mid-C14 octagonal responds of a former transverse arch
In the N wall are 6 arches: the easternmost is early C16, of plastered brick, 4-centred and of 3 chamfered orders with semi-octagonal responds of which the eastern has a moulded stone capital and base
The second, third, fourth and fifth arches are C14, rebuilt
The sixth arch is mid-C12, semicircular and of one square order
E of the head of the arch, partly cut away by the E wall, is a blocked C12 window with roll-moulded jambs and semicircular arch.
Above the fifth pier and centrally over the C12 pier is a C12 clerestorey window of one rebated round light, now opening into the N aisle but with the weathering of the original aisle roof below it.
The second, third, fourth and fifth bays of the arcade have 2-centred arches of 3 chamfered orders, and brick octagonal piers and semi-octagonal responds with moulded capitals, early C16.
The sixth bay is C12 and uniform with that opposite, except that all the attached shafts have scalloped capitals, and the impost mouldings are repaired with cement.
WEST WALL: is entirely C12, and was external before the timber belfry was erected against it
NORTH AISLE: has in the E wall the southern part of an arch, probably C13, dying into the C19 buttress
The N wall is C19 E of the porch and C14 to W of it
the easternmost is a single early C16 light with a 4-centred head, restored externally
the third window is C19 except for the head and tracery of the western light and the internal head of both lights, which are C14, re-set
the fourth is similar to the third, and is C14, re-set with some C19 stonework
Between the fourth and fifth windows is the mid-C14 N doorway with 2-centred arch, moulded label with C19 headstops, and restored moulded jambs.
E of the porch and projecting on C19 buttresses are two C17 gabled dormers, each of 3 lights with an oval light above, with moulded mullions, jambs and heads, and diamond leaded glazing
both have C17 bargeboards.
SOUTH AISLE: has in the E wall a blocked C13 2-centred archway with a moulded label on the W side
above it internally is set the carved figure of a beast with the head broken off.
W of this arch is a blocked C16 brick window with chamfered 4-centred head and jambs, visible externally.
the mullions and inner jambs are moulded in 2 hollow chamfers and are grooved for glass.
Cinquefoiled wooden tracery, also grooved for glass, appears to have been inserted after the original construction, probably in the late C15
2 arched braces have been removed from the E frame to clear the C12 windows, presumably in the C19 restoration.
The bell-frame is a later addition, wholly composed of straight timbers, diagonally braced, tenoned and pegged, probably of C16 construction.
It now appears that an originally unglazed window was glazed in the C15, and that the cinquefoiled tracery was inserted at that time.
The multiple curved bracing, the heavy sections of the braces and brackets (even those which do not carry much stress), and the form of the tying-joints, are all more typical of the early C14.
In the chancel and nave are floor slabs to Stephen Smyth 1670
Henry Smyth 1671
Stephen Smyth 1672
Thomas Smyth 1684
and Arthur Smyth, undated, all in black marble with achievements of arms, and to Simon Lynch, Rector of Runwell, 1660, with achievement of arms.
and on the S wall a monument to Joanna Gibson 1746, in alabaster, with tented drapery, putti and scrolls incription partly indecipherable.
There are 5 bells, the second by Miles Graye 1657, the third by Miles Graye 1648, and the fourth by Thomas Lester 1752.