The church at Britford is dedicated to St. Peter and is a Grade I listed building. Several memorials in the churchyard are listed as Grade II. At the time of the Domesday survey in 1086, the church was in the hands of Osbern, a priest. A charter of Henry I, in around 1134, lists the church as part of the gifts received by the Dean and Chapter of Salisbury since 1091.
The church itself is thought to be Anglo-Saxon, potentially with elements from as early as the 8th century. The nave probably dates from around 800 A.D. and has two side chapels. The arches of the nave are made mainly of Roman bricks. As with the Saxon Church at Bradford on Avon there were two side chapels and the openings to these chapels were discovered during the Victorian restoration of the church in 1873.
The south door of the church is also Saxon; before the restoration of 1873 the doorway was blocked, meaning people had to enter through a porch in the west wall.
The church was changed in the 14th century when transepts and a chancel were built and an apse was pulled down. This work began in 1280 and went on until 1330.
The south transept holds pews which belonged to the earl of Radnor. The window here was a gift from Helen, Countess of Radnor in the early 20th century.
The pulpit is imitation Jacobean, with panels showing a dove with an olive branch and angels and the other shows the Tree of Life.
Two years and more, great pains I bore,
Lost one leg, and part of a thigh,
Death in the end has proved my friend,
And free from pain in peace I lie.
The parish registers from 1572, (burials), 1573 (marriages) and 1587 (baptisms), other than those in current use are held in the Wiltshire & Swindon Record Office at Chippenham.