The present building can be said to date from 1092 when a prebend of "Great Bedwinde" was founded in connection with Old Sarum Cathedral, During the following centuries the building has been considerably altered and many additions made.
The oldest portions of the building are the piers and arches of the Nave. These are in transition Norman style combined with Early English ornament. The three heads carved on the capital on the south side of the Nave are Early English. The Transepts, Chancel and Aisles belong to the Decorated, Early English and Perpendicular periods respectively. There was a major restoration of the church in 1854.
To tour the church, go to the South Aisle. In a display cabinet are old service books and a manuscript by John Ward (Vicar 1826-1850) describing the church and its monuments. Pass up the aisle, noting the board listing donors for the 1854 restoration and the various village charities. Go past the Friendly Society Banner (depicting the Good Samaritan 
) into the South Transept.
The South Transept is now used as achoir vestry and meeting room. Below the South window are two low arched recesses. In one of which lies the stone effigy of a crusader knight , Sir Adam de Stokke, who died in 1313, and in the other a flat stone, the grave of his son, Sir Roger de Stokke who died in 1333.
Move past the organ (previously in Romsey Abbey) and through the wrought iron screen into the Chancel. In the Sanctuary, on the south side is a piscina and on the north side a very fine Elizabethan monument to the memory of Sir John Seymour , father of Queen Jane Seymour and of the Protector, Duke of Somerset. Next are two interesting brasses, one to the memory of John Seymour who died in 1510 and the other to the memory of Lord Beauchamp who died in 1612. Above these brasses is a lancet window with early stained glass brought to the church in 1901 from Wolfhall, the home of Lady Jane Seymour. Moving back towards the crossing there is a classic featured marble bust to the memory of Lady Frances Devereux, daughter of the Earl of Essex.
Go past the Victorian stonepulpit and through the screen into the North Transept (now used as a side chapel). This early carved wooden screen was, until 1854, a Rood Screen across the Chancel. The interesting history of its rediscovery and eventual restoration to the church can be found in a frame in the North Transept. Also in this Transept on the floor under the North window is a grave slab with Latin Inscription on a brass plate to the memory of Thomas Dogeson, Vicar of this church who died in 1501.
On moving into the North Aisle, note the niche by the wooden pulpit with a Fourteenth-Century figure carving of the Virgin and Child, believed to have been mutilated by Parliamentary soldiers during the Civil War. Any older stained glass in the windows would have been destroyed at that time.
The font and pews in the nave date from the 1854 restoration. Note the Norman "dog-tooth" pattern on the arches and the exuberantly carved capitals. Apart from the glass from Wolfhall, all the stained glass is Victorian. Most was given by the Brudenell Bruce (Ailesbury) family, whose Arms are on the West window and whose symbol - the lion passant - can be seen above the arch to the Crossing.
The six bells are one of the heaviest rings in Wiltshire and date from 1633 to 1671. The Tenor Bell weighs 1.25 tonnes.
The churchyard contains an ancient and well-preserved Preaching Cross .
