St. Andrew’s Church at Irnham (Grade one listed) is among the most noteworthy of Lincolnshire’s many medieval churches, being ‘home’ to the famous Luttrell Psalter of circa 1325 - 1340. It is large (for the size of the community), light and bright and contains many fine monuments from the early medieval to the late Georgian periods, along with brasses, Royal Arms of King George I and a mid-Victorian Hatchment. Nikolaus Pevsner describes what was then thought to be a stone Easter Sepulchre to the Luttrell family as the great surprise … most ornate and inventive. Between 2000-2004 the PCC undertook a major programme of works that saw the building re-roofed, re-wired and relit, heating installed, the windows conserved and restored, the organ renovated, a kitchen area created, a water supply introduced and external drainage improved,. The Tower was augmented with a new Bell and an outer door, by Ptolemy Dean (now Surveyor of the Fabric at Westminster Abbey), was installed.
Services normally take place at St. Andrew’s every Sunday at 10.45am., except on a fifth Sunday in the month.  Holy Communion is celebrated on the first Sunday of the month, with Matins on other Sundays. 
The Rector of St Andrew's Church is The Revd Stephen Buckman
A brief guide as you walk around the church can be downloaded here.