English Presbyterian Chapel

Walls are plastered and painted, lower half with tongue and groove panelling below a panelled dado. Wagon barrel roof of tongue and groove forming chevron pattern. Nave of 2.5 roof bays (4 panels per bay), central 2 panels with decorative pierced metal ventilation grilles. Chancel and transepts each a single bay with vaulting at intersection, floriate bosses. Trusses are carried down to colonnettes supported on moulded corbels, some with shield on facing panel. Chancel is raised by 3 steps, through a pointed arch of two orders, supported on marble colonnette above a moulded corbel. Label above with floriate stops. Arches of 3 chamfered orders above engaged Tuscan style columns to transepts. Reredos is limestone, now painted, formed by an applied order of cusped pointed arches across E wall. A square headed doorway SW end of the chancel opens to stairs leading down to vestry, schoolroom, kitchen and toilets below.

Fittings: Font, C20, octagonal. Pulpit, octagonal with 4 facing panels, applied order as for reredos with composite pillars of marble colonnettes and small engaged marble spheres between arches, under a floriate frieze. Raised by 3 curving steps with brass handrail supported on iron balusters and floriate brackets. Pews and choir stalls of pitch pine, organ in chancel with ornate pipes, fitted when the church was built and the first blower organ on the island.

Glass: W gable window in 'chancel'; biblical scenes, erected to Robert Davies of Bodlondeb, d.1905.

Monuments: N transept (also known as the Davies Chapel) series of white marble tablets with peach and green borders; to members of the Davies family of Treborth Hall, on W wall, pink veined marble with inscription tablet surrounded by angels set within a moulded surround with floriate design, to Richard Davies d.1896. Chancel, brass plaque (and W window) to Robert Davies d.1905. Nave, N wall, white marble plaque to R G Thomas, architect of the chapel, d.1909; S wall, 2 marble plaques to those who fell in 1914-18 and 1939-45 World Wars.

A cruciform plan chapel planned in the style of a Decorated Gothic church, and with lower storey housing vestry, schoolroom etc. Main body of chapel in form of 'nave' of 3 bays with shorter, narrower 'chancel' at W end, canted vestry in SW angle, and tower and spire incorporating the entrance in the lower stage, in the angle between nave and N transept. Built of snecked granite (darker in the lower storey) with limestone ashlar dressings and offset buttresses, articulating the elevations by dividing them into regular bays. Slate roof with decorative red clay ridge tiles and stone copings, crosses at each gable. Tower has angle buttresses and stepped chamfered angles in the upper stage, providing a link to the spire which surmounts a polygonal bell-chamber stage with lancet lights between engaged shafts. Pointed arched windows with geometric tracery to upper storey, with relieving arches and labels with floriate stops: single and 2-light windows to 'nave', 3-light windows to transepts, and richly traceried 4-light window to 'chancel'. Transept and chancel have wheel or trefoiled windows towards their apexes. Simpler windows in lower storey.