Interior
Tall spacious interior with S transept and N transept gable (intended to be removed for full transept if funds allowed), plastered walls and dominant open truss roofs with high collars and deep arched braces, 5 main trusses to nave, 4 to chancel, 2 to S transept and one to N transept. Nave has corbels to main trusses and intermediate trusses without the bracing, chancel roof is slightly higher and narrower, more ornate with windbracing and trusses on ashlar corbelled column shafts with moulded capitals and carved corbels. Crossing trusses rest on similar corbelled columns, paired in W angles and single columns on E walls of transepts, the chancel being narrower.
Plastered walls with ashlar dressings to segmental pointed surrounds to windows. Transepts have 2-light long window with roundel in big pointed shafted surround with keeled arch moulding. Chancel has stone flagged floor, pointed N vestry door, and two steps, one before vestry, the other at sanctuary with timber rails with column shafts and pointed cusped arches. Patterned tiles to sanctuary floor. Very large E window in moulded pointed surround with angle shafts and splayed sill.
Nave W end has late C20 lightweight inserted meeting room with low ceiling.
Fittings: Large and ornate later C19 Gothic pine organ case in S transept with painted pipes said to have come in 1880 from Exeter via St Andrew's Church, Cardiff, but it seems improbable that such a large piece would have moved twice so soon. Three fine hanging brass coronae on twisted iron rods, each with 5 gas lamps now electric. Four small brass wall-lamps in chancel. Severe ashlar octagonal font with chamfered top and bottom to deep bowl on quatrefoil squat column. Hexagonal timber pulpit with cusped traceried blind panels and angle buttressing, matching reading desk with poppyhead finials attached to stalls with pierced frieze of square quatrefoils. Pitch pine nave pews. Timber reredos with painted texts of Lords Prayer, Ten Commandments and Creed. Fine E window stained glass of 1863-4 with 15 scenes in bright colours on blue grounds, each in oval frame, probably by Wailes, and given in memory of Anthony Hill, the founder of the church. Marble scroll plaque on S wall to Hill 'for many years joint and of late sole proprietor of the Plymouth Iron Works', died 1862, and buried under chancel, the memorial by H. Cade of Bristol. Shafted memorial to Rev. W. Green died 1891 by C. Price of Troedyrhiw, and matching plaque opposite to Rev P. Williams, died 1926. Also on N wall marble plaque to S.B.Edwardes of Rhydygors, Carmarthen, and Plas Brynteg, 1824-79, by W. Davies of Carmarthen; and brass plaques, one with design of 2 mourning soldiers, to Pte J. Ball died at Pretoria 1900, another to William Lewis of Fernbank, died 1906, 'erected by the surface workers of Messrs Nixon collieries Merthyr Vale and other friends'.