From the Wiltshire County Council website: "The chancel was rebuilt in the late 13th/early 14th century. The font is also 13th century (although it has been recarved and has a 17th century cover). Chantries were founded, and the chantry priests lived in a small room above the north porch of the church.
"In 1450, the present nave was built, with a clerestory and a fine wagon roof. After the Reformation, the Arundells, who remained Roman Catholics, lost the patronage of the church. However, many families in the area also remained true to the Old Faith under the protection of the Arundell family: and so it is likely that the congregation at St. John's was somewhat reduced.
"In the 1660s, the Jacobean pews and pulpit were built in the church.
"The church was rewired in 1972 and a new lighting system installed."