Only the 15th Century tower remains of the original medieval church. Between 1734 and 1744 the main body of the church was rebuilt in the Georgian classical style. It was designed by Francis Smith of Warwick and greatly influenced by James Gibbs, the designer of St Martins in the Fields in Trafalgar Square.

The church opened for worship on 16th September 1744. And, as styles and patterns of worship have changed over the years, several changes have been made to the church, these include:

• the creation of vestries,
• the movement of fonts around the building,
• changes to,  and movement of, the pulpit,
• the lowering of the height of the pews,
• the provision of the Florentine copy of Leonardo da Vinci's Last Supper in the apse, and
• the installation of a Burne Jones stained glass window.

Within the church there are still items that relate to the church pre 1734, including:

• the benefaction boards located underneath the organ,
• the Chandler in the main body of the church, and
• the Rollett tomb stone by the entrance to the church, and which once stood in the church yard marking the grave of Captain Cook's sailmaker who was born in the town.

The Church tower has a set of 8 bells which are rung every week. The Organ, by Walkers of Ipswich, is a fine example of a 3 manual instrument which again takes a prominent place in church music.

It was the re-ordering of the church in 2003-4, which was funded by a bequest from a local vet, that enabled the restoration of the external stone work and for the installation of a circular dais to match the curve of the Georgian apse, a new nave altar, extra lighting and a complete redecoration of the building. At the west end of the church underneath the tower, one of the vestries is now a cafe open to the town.