[1] Originally it was a chapel subordinate to the ancient church of St Mary, Harrow on the Hill, forming part of the deanery of Croydon which came under the immediate jurisdiction of the Archbishop of Canterbury.

[2] Henry James Pye, Poet Laureate to King George III, was buried in the church and William Skenelsby, who died at the reputed age of 118 years, was in the churchyard.

Among the church treasures is a 15th-century octagonal baptismal font, altar rails from the 17th century and an oak chest which must predate 1622, as it was recorded that it needed a new lock that year.

Numerous memorials include one in the church to Sir Christopher Clitherow, a former Lord Mayor of London who owned land on Pinner Hill in the seventeenth century; and an unusual one located in the churchyard, on the south side.

It is in the form of a stone pyramid with a fake sarcophagus within, and was erected by the eighteenth-century botanist John Claudius Loudon in memory of his parents.