The church was rebuilt in 1878 and is famous as the only church designed by the Pre-Raphelite architect Philip Webb. Almost all of its stained glass windows were designed by Burne-Jones. {Source: Leaflet "Brampton Town Trail".} See also
NY5261 : St Martin's Church, Front Street, Brampton (photo by Humphrey Bolton) that gives a condensed version of Pevsner's description of the church.
See also the Wiki entry
Link. The church's website
Link includes a link to a pdf version of the information leaflet available in the church (it's under "Brief History").