English: The tall square tower of this marshland church leans considerably to the west.

Its oldest parts date from around 1150, this includes the western tower and arcades. The church was extensively restored by Withers in 1886. The church is now redundant since 1973 and the care of the Churches Conservation Trust. The church is built in a mix of materials, greenstone, limestone, red brick and render. The roof is of lead and slate. Buttresses were added to the tower in the nineteenth century to halt the subsidence caused by marshy ground. The top of the tower dates from the fifteenth century, as does the porch.

The porch has a pointed inner doorway from the fourteenth century. Above the porch door there are Shields bearing the emblems of the passion and crucifixion. There is an inscription "Situs est sanctum Johis' Grantham de Moulton, Pahoni istius Ecclesiae".

The south aisle arcade dates from circa 1200 with four bays plus a narrower bay to the west. There are round piers. There is no north aisle. Three mediaeval bells are on the floor which were rescued from Saint Botolph's church in Skidbrooke.

There is a fourteenth century screen of five panels and a similar screen to the south-east Chapel. There are traces of colour remaining on the wood..

The chancel has an unusual double south arcade with two mid-set twelfth century bays overlapping a thirteenth century bay. The chancel has an aumbry to the north, and piscina to the south, both have triangular heads. In the south chapel there is a fourteenth century carved stone reredos with grotesque heads. There is also a 16th century altar table.

The nave and south aisle have fifteenth century wooden tie beam roofs with carved bosses repaired in 1611.

There is an ornate Jacobean pulpit with carved panels and another 17th-century pulpit given by Oriel College Oxford.

The thirteenth century font has an octagonal bowl with four large grotesque heads at the base. It appears to sit on an inverted font of a later date.