Out of the parish, two more parishes were created as the population increased after the Middleton council estate was built. In 1921 the church acquired a site on the Middleton housing estate on which to build. In 1925 a mission church was built off Middleton Park Avenue. The Church of St Cross was built in 1933 and became a parish church in 1935 with about two thirds of the Middleton housing estate in its boundaries. In the 1930s the Belle Isle housing estate was begun. The Church of St John and St Barnabus was built in Belle Isle in 1939 but not consecrated until 1947 because of the war. This church became a parish church.