According to church documents, in the late 19th century the church founded the local cottage hospital and St John's School, and in early years of the 20th century recorded regular congregations of more than 1000 at both morning and evening services.

In more recent years, Sally Hitchiner was curate from 2009 to 2012, during which time she developed a role as a media commentator and was frequency seen on television discussing religious affairs.

The Arabic-speaking Living Waters Arabic Church meets on Sunday afternoon, as does the Burmese-speaking Myanmar Christian Fellowship.

There are also a large number of midweek groups and activities, including "Snips" which has been providing a carers and toddlers playgroup/cafe/shop at least twice each week since 1987.

St John's has a "sister" church, St James in West Ealing (currently closed), founded in 1900, disused later in the century and "re-planted" with a new congregation in the late 1980s St John's is also the venue of the Ealing Soup Kitchen which has been supported by many local churches providing meals each Saturday and Sunday since 1973.