[2] St Martin's originated as a chapel of ease,[1] and what now remains was the chancel of a medieval parish church.

The south side of the church contains two buttresses, three square-headed windows with two or three lights, a round-arched priest's door from the 12th century, and a 19th-century doorway.

[1] Many of the carved wooden fittings were made by Rev E. D. Poole, the vicar of the church in the 19th century.

To the left of the south door is a royal coat of arms, and on the east wall is a pair of benefactors' boards.

The monuments include a stone coffin slab from the 14th century carved with the bust of a man above a foliated cross.

[9] Also buried in the churchyard, within a family grave, are the ashes of Archdeacon the Earl of Cavan (died 1950), a chaplain veteran of the same war.