File:Thorney, St Helen's church west end (31377972901).jpg

Thorney is mentioned in the Domesday Book without any reference to a church. The original church had a low brick tower with two bells, a nave and a side aisle. Presumably it became dilapidated and was rebuilt in 1850. There is a fragment of a 15th C. arcade and a window which have been re-erected in the churchyard. The church was built by L. N. Cottingham in a Norman style, and consists of nave, chancel, vestry, and bellcote. There is a highly ornamented central turret (sanctus bellcote). The church has much exterior carving and a corbel table of grotesque heads. The west door has detailed carvings in the three order arch. Above this are three lancet windows, and above that a wheel window. This is topped off by the western bellcote with two bells.

Inside there is an aisleless nave, with a hammerbeam roof. There is a carved square stone pulpit and matching lectern in a similar style. There is a 19th-century font, circular with blind arcading, and also the remains of an old 12th century font. There are several memorials to the Neville family, some transferred from the old church.

The church has stained glass windows throughout, although these are in poor condition.