Southwark represents the biggest concentration of African Christians in the world outside the continent with an estimated 20,000 congregants attending churches each Sunday. African churches opened their doors in London from the 1960s, migrants, many of them from Nigeria and Ghana, sought to build communities and maintain cultural connections with their home countries by founding their own churches. As the communities grew, the churches moved into bingo halls, cinemas and warehouses, gathering congregations of up to 500 people where services are streamed online by video cameras