 At the same time, a vestry and a gallery for the organ were added.One of Portslade's most prominent families, the Brackenburys, had their family vault at the church, and between 1869 and 1874 the Brackenbury Chapel was built at its west end.Highly elaborate, in contrast to the simple church, it was built by Hannah Brackenbury, who was buried there when she died in 1873.