The current three-manual organ stands at the west end of the church and was built by Peter Collins of Melton Mowbray in 1989. The organ possesses almost 3,400 pipes, which are arranged in towering cases with trumpets "en chamade". Carved details on the cases by Derek Riley show Scottish plants and animals, a Franciscan Friar, and Greyfriars Bobby. Along the frieze of the towers runs the penultimate phrase of Psalm 150: ""Laudate Dominum onme quod spirat"" ("Let everything that hath breath praise the Lord"). A chamber organ stands in the north aisle: this was built around 1845 by David Hamilton of Edinburgh and purchased in 1968.