Interior of the church
The church is tall and cruciform in plan with the chancel at the west instead of the usual east. The chancel is taller that the nave and is square ended. The transepts are double width with a slender column at each transept.
The barrel-vaulted roof over the nave has five diaphragm arches resting on stone shafts with carved capitals and angel corbels. The sittings are pitch pine. The roof over the chancel is painted blue.
The walls of the sanctuary and chapels are faced entirely in local Storetin stone.
There is a narthex with choir gallery and organ loft above.
When the low flat-roofed aisles were added, in 1934, sections of the lower nave walls had to be removed and some of the windows reduced in height. In these aisles are shrines to St. Anne, the mother of Our Blesses Lady and St. Theresa of the Child Jesus, which were added in 1953.
Reordering
After the Vatican II Council of the 1960s, reordering of the sanctuary was necessary so that during the Mass the altar would be closer to the congregation and the Priest would face the people; Holy Communion would be received standing rather than kneeling at the alter rails and although the Priest would still proclaim the gospel, there would be lay readers for other readings.
To facilitate the changes, the altar table and the panel underneath it, portraying the Last Supper, the pulpit and altar rails were removed, and the sanctuary was brought forward.
Photographs show that the whole of the sanctuary, the St. Joseph chapel and the transept floors were originally tiled as the Lady Chapel, though all are now carpeted.
Two sections of the altar rails with their four colourful mosaics have been retained at the side of the sanctuary.