The crossing tower had a ring of six bells until 1915, when they were increased to eight by the addition of a new treble and second bell. In 1636 Roger I Purdue of Bristol cast what are now the fourth, fifth, sixth and seventh bells. In 1721 Abraham II Rudhall of Gloucester cast the tenor bell. Mears and Stainbank of the Whitechapel Bell Foundry cast the third bell in 1898 and the new treble and second bell in 1915, and recast the seventh bell in 1960. St Mary's has also a Sanctus bell that John Warner and Sons of Cripplegate cast in 1854.