In 1885, when F.G. Jannaway was 25, his older brother A.T. Jannaway, then 31, became involved in the first of a series of "controversies" which would mark, and hamper, the development of the Christadelphian movement in London. A.T. Jannaway strongly supported the position of
Robert Roberts. In 1894–98 A.T and F.G. were directly involved in reaction to a second controversy which had originated in London, nominally over "resurrectional responsibility". Although the immediate problem had been resolved by the original source of the teaching, J.J. Andrew, having withdrawn himself in 1901, the Jannaway brothers were instrumental in persuading the influential Birmingham Central Ecclesia, who then met at
Temperance Hall, and the then editor of
The Christadelphian magazine,
C.C. Walker, to take a stricter line over all those who failed to adopt the 1898 "Amendment" to their statements of faith, leading to the division of ecclesias in North America, and separation from the
Unamended Christadelphians, led by
Thomas Williams of Chicago. Then in 1923 F.G. Jannaway created further division when he broke with Walker, his former travelling companion in Palestine, when Birmingham failed to discipline two of their "Arranging Brethren" who had abstained on a vote to "disfellowship" two members serving as special constables. This new split led to the formation of the
Berean Christadelphians with a majority of Christadelphians in London lining up behind the Jannaway brothers. This coincided with the Jannaway brothers' support for William Smallwood in North America who led the remaining
Amended Christadelphians to separate for what would be a period of twenty-nine years (1923–1952). The 1923 division proved to be the last major division within the Christadelphian movement, and after the departure of Clapham the mood in the main "Central" grouping turned towards efforts for reunions, effected 1952–1957. However, in the Clapham group the doctrine of fellowship held by the Jannaway brothers, effectively guilt by association, led to further splintering. In 1926, when F.G. was 62, and his brother A.T. was 68, the brothers themselves divided over the question of the permissibility of divorce in cases of adultery. A.T., who took the more lenient view and had advanced that it was allowable, had to leave Clapham, and formed the Family Journal fellowship. F.G. Jannaway also separated from another influential speaker, Viner Hall. ==Publications==