The church is adorned with various mosaics and stained glass windows.
The western apse, which is used as the Baptistery. It is adorned with a Mosaic floor which was laid to mark the church’s Golden Jubilee in 1958. The mosaics represent the children who were part of the congregation in past years and depict numerous objects associated with children. The apse mosaic was made in 1921 and depicts the descent of the Holy Spirit.
There are also three stained glass windows which were made by Morris & Co. and depict the Annunciation, the Baptism of Christ, and
Christ blessing children. These were installed between 1923 and 1926. The Baptismal font is made of Italian marble and was dedicated in 1912. It depicts an angel holding a scallop shell.[4]
The north aisle includes a set of stained glass windows which depict the beatitudes. Some of these were made by James Powell and Sons in the 1930s, while others were made between 1950 and 1960 by Gordon Webster.
The chancel apse mosaic was designed by James Powell and Sons in 1927. It depicts Christ in Glory sitting on a throne over a rainbow, surrounded by the Four Evangelists, the Seraphim four Archangels, and the Heavenly host.
The high altar was dedicated in 1920, and was designed in the Romanesque Style by Peter MacGregor Chalmers. The choir is made of Austria oak and was designed by Gordon Galloway. These were completed in 1923, including the pulpit. The organ case was completed in 1924 while the Bishop's chair was completed in 1926. The organ is the work of Blackett and Howden, and was dedicated in 1924.
The stained glass windows include; The Transfiguration and The Ascension of Christ by James Powell and Sons (1927); The Crucifixion, The Adoration of the Magi, and The Resurrection of Christ by Morris & Co. (1924-1927); St John by Gordon Webster (1973); and Abraham by Hugh McCulloch (1927).
The south aisle contains a number of stained glass windows; Christ commissioning his disciples to preach the Gospel by James Powell and Sons (1935), Saint Margaret of Scotland by the St. Enoch Studio (1949), Simeon by Gordon Webster (1971), Saint Thomas by Roland Mitton (1997), Gethsemane by John Clark (2001), and the Last Supper and The supper at Emmaus by John Clark (2002).
The Lady Chapel, located at the eastern side of the chancel, contains a set of stained glass windows which depict the life of Saint Margaret of Scotland. These were made by James Powell and Sons and were installed and dedicated in 1930.