The south-west tower holds 14 bells (tenor 59 cwt or 3 tons) hung and rung for change ringing and 22 carillon bells (tenor 23 cwt or 1.2 tons) which are played from a baton keyboard in the ringing chamber (all together 35 bells.
Severozahodni stolp ima "Velikega Petra" (216 CWT ali 10,8 ton) in šest ur z zvonovi (največji tehta nekaj več kot 60 CWT ali 3 tone).