This collection of caches has nothing to do with the Church Micro series in the UK. Given that the Australian 2021 census indicates that No Religion and Jedi Knight are still the fastest increasing classifications of the optional religion question "What is the person's religion?" it is not surprising that there is surfeit of empty churches that have been repurposed.
St Augustine's Catholic Church, Spalding
The stone church was part of the Diocerse of Adelaide. The church had opened about 1901. The church is closed, and the property was sold in Jul 2021. No other details are known.