The controversial discussions were a protracted series of meetings of the British Psychoanalytical Society which took place between October 1942 and February 1944 between the Viennese school and the supporters of Melanie Klein. They led to a tripartite division of training in the society after the war with the three groups of Kleinians, Anna Freudians, and the Middle (or later Independent) Group.
In these sessions the differences between classical Freudian analysis and newer Kleinian theory were argued with considerable vehemence. The Freudian side was principally represented by Anna Freud, who was resistant to the revisions of theory and method proposed by Klein as a result of her work as an analyst of young children. The Klein Group included Susan Isaacs, Joan Riviere, Paula Heimann, and Roger Money-Kyrle. The Anna Freud Group included Kate Friedlander, and Willie Hoffer. The "Middle Group", who tried to apply a moderating force included Ella Freeman Sharpe, James Strachey, Sylvia Payne, Donald Winnicott, William Gillespie, Marjorie Brierley, and later, Michael Balint.
In the agreement, eventually formalised in November 1946, two parallel training courses were established, one for candidates aligned to the Anna Freud school and one incorporating training from Freudian and Kleinian analysts as well as from the non-aligned analysts from the Middle or Independent Group. On this basis the agreement specified that:
It was agreed further that all the key policy making committees of the BPS should have representatives from the three groups.[1]
'A Critical Dictionary of Psychoanalysis' (Penguin, 2nd Ed, 1995)