Within a few years it had established an annual conference, and, in 1914, a theological journal (Modern Believing).
Its most famous conference was 'Christ and the Creeds' in 1921. It caused a great deal of controversy, not because the MCU took a particular line but because a range of challenging views were expressed. The Church of England set up a Commission to look into the matter. The Commission duly reported in 1938 and accepted that a range of different views was permissible.
In 2008, the annual conference of the Modern Churchpeople's Union was held in Hertfordshire and was chaired by the Archbishop of Wales, Barry Morgan.