This is the smallest church still in use in the county of Lincolnshire. It was rebuilt in 1826 and altered twice later in the 19th-century. However, its origins are much earlier. Inside the chancel arch contains a stone with Anglo Saxon interlace carving.

The small nave has a single gabled bellcote and tiny chancel. The windows are simple with three lights under square heads. The door is planked with a segmental arch and keystone.

This church is contemporary, with the rebuilding of the church and the box pews, pulpit and reading desk. The royal coat of arms is dated 1825, and the two painted commandment boards are of a similar date. Earlier are the 17th-century altar rails in a barley sugar twist style and the medieval tub font.

In the Sleaford area there are three places named Willoughby - West, Scott and Silk Willoughby. The place name probably means ‘place amongst the Willows’. Scott could give reference to Irish or Scottish inhabitants.