The south aisle houses the Mariners Chapel. This small chapel now provides a focus in an aisle used for exhibitions, discussions and parish hospitality.The wooden screen commemorates the links that the church has with the Port of London Authority. The windows of the south aisle contain the coats of arms of shipping companies associated with the church.
The models of ships in this aisle have been presented to the church over the years as a token of thanksgiving, reminiscent of days when sailors made votive models of the vessels in which they sailed. In a wooden case on the south wall is a Memorial Book, the gift of the Maritime Foundation, which lists the names of those who have died at sea and have no known grave.