Interior
Inside the S door are concrete steps up to the level of the nave. Nave and chancel have a roof of 18 narrow bays with arched-brace trusses, mainly of 1908 but reproducing the earlier roof. In the chancel are 4 tiers of windbraces forming quatrefoils, while in the nave are 3½ tiers and every third truss has a tie beam. To the L of the reredos is a segmental-headed doorway to the tower. The tower has springers for a vault, but they have stiff-leaf capitals, and therefore appear to have been re-set here, probably in 1908.
The W gallery is on 2 octagonal posts, has a front of turned balusters, and straight stair with similar balusters. It is dated 'July 7, 1716', with a further inscription 'IH, GI, CH'WARDENS, IC, UNDERTAKERS'. On its N side it projects forward, beneath which is a contemporary schoolroom, now a vestry, with wooden panelling. The restored rood screen has a broad doorway with triangular head, and 8 narrow bays either side with open tracery heads (copied in 1908 from Llananno), above which is a plain beam and brattishing. The dado is panelled but does not correspond to the bay structure above. In the chancel is a communion rail inscribed 'IHCW/EDG/1828', with plain balusters. Re-used pew ends form a wainscot in the N and S chancel walls. In the N nave wall are 3 fragments of wall painting, probably post-Reformation and comprising the frames for inscriptions. The panelled and painted wooden reredos of c1950 is in simple classical style, and has a tall central panel under a tester, with Crucifixion in low relief. Outer panels have shields in low relief, the R-hand representing St Cynllo, and are surmounted by carved angels.
Near the W end of the nave, opposite the entrance, is an ashlar baptistery, with iron gates to stone steps. Allowing full immersion, the unusual presence of such a baptistery in an Anglican church is considered to have been influenced by the strong Baptist tradition in the locality, although it is said to have been used only 3 times in the C20. The font is medieval, with a plain but asymmetrical octagonal bowl, short stem and square base. Pews of 1908 incorporate panels of older box pews, and have panelled ends. The plain panelled pulpit with tester is early C19 (perhaps the same date as the communion rails), and was originally a double-decker pulpit on the S side of the nave. Choir stalls have shaped ends and fronts incorporating open arcading.
There are several wall monuments. In the nave N wall, from the W end, is a freestone monument to David Lloyd (d 1838) and family, by Davies of Clun. It has 2 inscription panels and a further inscription to the apron, framed by shaped balusters, entablature, and pediment with low relief urn, flanked by finials. It originally occupied the chancel E wall but was moved here in 1908. Next is a neo-classical wall tablet to Edward Meredith (d 1833), comprising a slate inscription panel with freestone surround incorporating an apron, and tall gable with low-relief urn. Further E is a simpler wall tablet to Evan Williams (d 1790), comprising a slate inscription panel with broken pediment and urn. In the nave S wall, beginning at the E end, is a simple freestone tablet to Thomas Davies (d 1805) and family, comprising a inscription panel surmounted by an urn. Next is a tablet to Eleanor Griffiths (d 1841), comprising a slate panel with freestone surround. In the embrasure of the chancel S window is a freestone tablet commemorating Elizabeth Bywater (d 1830) and Richard Bywater (d 1867), by D. Davies of Clun. It has oval inscription panels in a low-relief surround with gable and urn. In the chancel S wall is wall tablet to Richard Bywater (d 1827), a slate inscription in freestone surround with apron and pediment. In the tower is a wooden wall memorial to Anne Thickens, by J. Griffiths and dated 1827.