In 1985, after a protracted process of political degeneration, the Workers Revolutionary Party, the former British section of the ICFI, broke decisively from Trotskyism.

In May-June 1986, the International Committee of the Fourth International met and made an exhaustive analysis of the theoretical, political and historical issues involved in the WRP’s degeneration and collapse. How the Workers Revolutionary Party Betrayed Trotskyism demonstrated that the crisis in the WRP was bound up with its retreat from the principles that the British Trotskyists had previously defended in the founding of the ICFI itself and, later, in their struggle against the unprincipled reunification carried out by the American Socialist Workers Party with the Pabloites in 1963.