[2] It is the largest church in Hertfordshire, other than St Albans Cathedral, and can seat up to 1,000 people.

[3] The parish dates back to before the 10th century,[2] and a church was present on the site at the time of the Domesday Survey.

The foundation stone was laid on 25 March 1893 and the new church was consecrated by the Bishop of St Albans on 20 February 1895.

The tower is in three stages, with a half-octagonal stair turret on the north side, and buttresses at the angles.

At the northwest corner of the church is a two-storey hexagonal porch, with angle buttresses, and two-light windows.

On each side of the church, at the junction of the nave and chancel, are octagonal turrets with castellated parapets and low domes.

The alabaster reredos, presented to the church in 1914, contains a carved panel depicting the Last Supper and four saints.

The font is of polished fossil limestone, and consists of a carved octagonal bowl carried on a column.

[3] The memorials include fragments of brasses surviving from the earlier church dating from the 15th century.

The chapel contains a marble memorial to the 1st Battalion of the Hertfordshire Regiment, designed in 1921 by Reginald Blomfield.

[12] In 1971 the firm of Cedric Arnold, Williamson & Hyatt of Thaxted, overhauled the organ.

The work was in three parts: the complete overhaul of all the leatherwork (most dated from 1899); enhancements to the action and piston control systems; the addition of new stops: a Fanfare Trumpet, Great Clarion (as Willis intended) and 32' Reed (installed in October 2001).