The most wide-ranging structural changes in the building's history took place in the mid-19th century. These were planned by Rev. Thomas Astley Maberly, incumbent for 36 years from 1841, and his curate (and successor as vicar) James Cooper, who joined the parish in 1855. Cooper was a former member of the Ecclesiastical and Architectural Society. In 1839, an unnamed parishioner donated a barrel organ to the church, but its range of music was deemed inadequate. The same parishioner presented a new organ in 1842, which was well received by all and immediately changed the character of worship at the church, which had previously relied on a choir for musical accompaniment. The old font was also restored and repositioned in the church, apparently after being discovered in pieces in the belfry by the vicar. In 1846, a baptistery was formed in one end of the south aisle, some of the windows were reglazed (some with stained glass), a tiled floor was laid and new oak pews were installed.
