The church of ST. ANDREW consists of chancel 37 ft. 9 in. by 18 ft. 6 in., north chapel continuous with the north aisle 19 ft. 8 in. wide, south chapel 29 ft. by 16 ft., nave 51 ft. 6 in. by 23 ft. 6 in., north aisle 17 ft. 8 in. wide and measuring with the north chapel 85 ft. in length, south aisle 12 ft. 9 in. wide, west tower 14 ft. 6 in. square, a small vestry at the northeast of the chancel and a south porch. The building dates from Norman times, having consisted in the early part of the 12th century of chancel and nave only, but of this early building the only remaining details are the window over the tower arch and the north jamb of the chancel arch. At the end of the same century a tower was built at the west end— the arch communicating with the nave being still in situ—and in the early years of the 14th century a south aisle extending the full length of the nave was added, the east end of which was possibly used as a Lady chapel, while the chancel was widened on the south side, necessitating a new chancel arch, and perhaps lengthened. In the 15th century a north aisle was built, extending two bays beyond the chancel arch, and little more was done afterwards until the end of the 16th century; at this time great alterations were made by widening the north aisle, adding a vestry at the east end with a second door into the chancel, building a chapel on the south of the chancel, and entirely rebuilding the tower.

The east window of the chancel is of five cinquefoiled lights with vertical tracery above under a four centred arch. The 15th-century north arcade is of two bays with arches of two chamfered orders and a central octagonal pier with broach stops at the base; on the responds the arches spring from corbels moulded like the capital of the pier. The opposite arcade is a debased copy of the north arcade. The mouldings are poor and the broaches at the base of the shaft do not form a square. On the north of the sanctuary is a small chamfered four-centred arched doorway leading into the vestry, and above it is a late three-light chamfered square-headed window; opposite this in the south wall is a modern square-headed two-light cinquefoiled window, and between this and the arcade is the eastern part of sedilia, the western seat or seats having been cut away when the south chapel was added. The chancel arch, built at the same time as the arcade in the south of the nave (the respond corbels of which are similarly moulded to that on the south of the chancel arch), is of three pointed chamfered orders on the west side, and two on the east, and rests on a 12th-century north pier with scalloped capitals and moulded bases. At the north-west of the chancel, to the north of the chancel arch, is a doorway to the rood stairs, which opened on to the loft by the squareheaded doorway on the nave face of the dividing wall between chancel and nave.

The north arcade of the nave is of four bays with octagonal columns and corbelled responds, moulded similarly to those on the north side of the chancel. The south arcade, also of four bays, has octagonal columns and corbels of the early 14th century; the bases of the shafts are formed by octagonal plinths chamfered on the upper side and having broached stops. Above this arcade are plain mullioned clearstory windows, the eastern pair of three lights and the western pair a single light and a window of two lights. The tower arch is of three chamfered orders and rests on late 12th-century capitals, two each side, the shafts of which are gone; above it is an earlier window deeply splayed on the inside and having a semicircular head.

The north aisle has a late pointed doorway and a square-headed five-light mullioned window of the 16th century in the west wall. On the north side are six three-light square-headed windows, four being cusped in the style of the 15th century and two being later. Under the second from the west are the jambs of a former doorway and to the east of it is a holy water stoup. In the east wall is a five-light square-headed 16th-century window with no cusping, and to the south of it is the entrance to the vestry under a rough arch, which is covered by a 17th-century screen and door.

The chapel on the south side of the chancel has a late five-light square-headed mullioned window at the east end; in the south wall are a very small piscina, a two-centred window of three trefoiled pointed lights (both probably reset work of the early 14th century, the latter much restored, if not entirely renewed) and a doorway with a plain stone lintel on the inside; to the west in a projecting angle is a squint.

The south aisle contains two debased two-light windows with square heads; the heads of the lights are similar, but the easternmost window has a deeper reveal externally having two chamfered orders, whereas the mullion of the other is almost flush with the external surface, the former probably having been built in earlier jambs, while the latter was entirely renewed. The south doorway is of two continuous orders, the outer chamfered, the inner deeply moulded; there is a moulded hood with head-stops round the head, which is pointed. The whole is early 14th-century work. To the west of this doorway is a triple lancet window, apparently of 13th-century date renewed, and perhaps reset from the south wall of the nave.

The exterior of the church is simple in character; the tower, which is in four stages, is of late date and has an embattled parapet but no buttresses. The windows in the bell-chamber are of two transomed trefoiled lights under a square head, those in the other stages being mere slits with square stone lintels; there is a doorway into it on the south side, which has also a square head. The south aisle and nave are built of random rubble with an embattled parapet and there are no buttresses. The porch is very plain and has a pointed arched doorway with a small hollow chamfer. The roofs of both nave and aisles are low pitched; they are open inside and show their old timbers. The windows at the east end and those each side of the sacristy have moulded labels. The wall of the north aisle, built also of rubble, is divided by twostage buttresses into six bays, and its parapet and that of the nave project and are not embattled. All the windows have labels. The west window is also labelled and the doorway has square jambs.

The font has a Norman cylindrical bowl worked with diagonal lines on a modern base.

The chancel is separated from both the north and south chapels by screens pierced in the upper portion and panelled below, that on the north being of the 15th century and the other of later date. The latter also extends across the aisle, forming the Lady chapel. The pulpit is late Jacobean work and has a soundingboard dated 1718. In the east end of the north aisle is an old reading desk holding a chained New Testament, and over the font is a carved tabernacle-work canopy of the late 15th century.

In the floor of the Lady chapel is a slab to Elizabeth Blackburne dated 1688.

There are six bells: the first inscribed 'Gloria in altissimis Deo 1750,' by Dalton; the second by Mears, 1825; the third with the same text as the treble and dated 1763; the fourth by Dalton, dated 1779; the fifth inscribed 'Jesus be our speed 1623'; the tenor, which has been recently recast, bears the inscription 'Sancta Catarena ora pro nobis +.' The frame, which has since been repaired, is inscribed 'ja . . . . st harrison of barrow in lincolnshire bellhanger 1751,' and the churchwardens' names.

The communion plate includes a cup and cover paten of 1623, a large standing paten of 1718, inscribed 1720, and a large flagon of 1873. The church also possesses an old brass almsdish, which is stamped with a representation of the Fall, showing the figures of Adam and Eve and the serpent.

The registers begin in 1640. Mention of what must have been a select vestry occurs in the register under the year 1661, where it is stated that on Tuesday of Easter week following the restoration of King Charles II, 'after the unnaturall civil wars (by the blessing of God ended),' the four and twenty were elected, besides the four churchwardens. The entry of their election appears again in 1752. Other entries are those concerning the casting of two new bells and the repairing of the loft in 1661, and of three others by Dalton of York in 1751.