St Mary's had a ring of six bells until 1789, when John Briant of Hertford took them down and re-cast them into a ring of eight. The third bell was recast again in 1863, this time by George Mears and Company of the Whitechapel Bell Foundry. The sixth bell was recast again in 1927, this time by John Taylor & Co of Loughborough. St Mary's has also a Sanctus bell that was cast by Matthew I Bagley of Chacombe, Northamptonshire in 1681.