Smith, Stan - Lullington church, Sussex Downs
According to Wikipedia this is one of the smallest churches in the land:
Lullington Church, also known as the Church of the Good Shepherd, on the South Downs at Lullington in East Sussex is one of several churches claimed to be the smallest church in England. It was built from the remains of the chancel of an earlier church that was destroyed by fire, generally believed to have occurred at the time of Oliver Cromwell. It measures a mere 16 feet (5 metres) square and seats 20 people.