The Greater London Auxiliary is one of the Society's oldest auxiliaries still in operation. In the autumn of 2019, a meeting was held at William Tyndale House with men from the existing Auxiliary (Croydon, Brixton and Bromley) and with a good number of others from supporting churches across London to discuss the expansion of the Auxiliary to include the whole of the Greater London area. This was agreed to and received the approval of the Society's General Committee.

The inaugural meeting was scheduled for 25 April 2020 but was cancelled due to the Covid-19 pandemic. Lord willing, the meeting has been rescheduled for Saturday 24 April 2021.