Interior
The church is entered by the south doorway which continues the virtuosity of the porch. The interior has miniaturised details throughout; the design retains stonework of the original chancel arch, up to the imposts; the stonework has been dismantled and reconstructed, as is evident from the appearance of a trace of a painted fresco face in a low position at one side. Nothing remains of the original arch, which was 'rude and pointed' according to Glynne's description, suggesting the C13, though Halliday's drawing shows it as round and so possibly earlier. Other early stonework remains visible at high level in the chancel arch wall, above the pulpit.
The nave is dominated by its enriched oak roof with high collar beams, arch braces carried down below carved cornices to carved stone corbels, two rows of purlins, and two stages of wind braces, with carved bosses. At left is a carved pulpit with alabaster figures of three great Anglo-Catholic preachers, Keble, Liddon and Pusey, in its panels. The pulpit has its own opening through the chancel wall, with miniaturised vaulting. Another carved masterwork is the vestry doorway, with vesicas in the hollow of the arch mouldings featuring the Fathers of the Church, those of the Western Church on one side and those of the Eastern Church on the other. The architect's monogram is punched on the vestry door hinges. The nave windows have nook shafts; two of those on the south side are vaulted also. The stiff-leaf decoration is richly varied. The inside face of the entrance doorway carries a frieze of the heads of the apostles. The nave is paved in marble and the original heating apparatus stands beneath a central floor grille.
The chancel is entered by small brass gates. Its floor is of Numidian and Devonshire marble, in red, black and white, symbolising blood, earth and purity. The altar is comparatively plainly carved, and stands on a white marble podium, and is part of an integrated design with an alabaster reredos incorporating figures carved in white marble, stained glass, and side silk drapes hung on metal brackets. The central carved figures are the Virgin and Child, with angels and prophets. The east window shows the Crucifixion and St Mary and St John; the window shafts are in Connemara marble. At the south side a piscina and aumbry have been retained in situ, having been discovered under the plaster of the earlier church.
The chancel roof is also massively timbered in oak, with angels on the cornices. A C14 truss of the earlier chancel is retained, repositioned against the east face of the chancel wall. The pews and the prayer desks are in teak, the ends of the former carved with flowers and animals and the latter carved with intricate decoration of fish and pelicans.
The stained glass throughout is by Burlison and Grylls of London, to Halliday's design. The architect's drawing for the east window has been preserved, and interestingly in the representation of the Crucifixion the skull of the name Golgotha shown in the drawing has been omitted from the window. The west window represents St Nicholas.
The mediaeval cylindrical stalactite font was recovered and placed on a new plinth. It was found in the floor of the earlier building; a square font was in use in the mid C19. At the entrance there is also a mediaeval water stoup, found in the south wall of the earlier nave, also placed on a new plinth.
At the west are memorials to members of the Voss family, to James George of Nicholaston and to the Rev C R Wells. At the north side are memorials to Miss Olive Talbot and to the fallen in the Great War.