He then left to become one of the founders of the Workers International League, led by Ted Grant, Jock Haston and Ralph Lee.
Jock Sutherland | Jock Stein | Jock Ewing | Jock | Jock Haston | Jock Whitney's | Jock Sturges | Jock McFadyen | Jock Mahoney | Jock D. Mackinlay | Jock Campbell, Baron Campbell of Eskan | Jock Brandis | Jock Aird | John Ross "Jock" Ewing | Jock Young | Jock Tamson's Bairns | Jock Soto | Jock Slater | Jock Shaw | Jock Semple | Jock Rutherford | Jock Hamilton | Jock Edwards | Jock Colville | Jock Carroll | Jock Campbell | Jock Butterfield | jock |
Along with Jock Haston and Ted Grant, he played a role during the second world war in the Revolutionary Communist Party, the British section of the Fourth International.
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In 1946 Deane was the British delegate to the International Conference of the Fourth International alongside Jock Haston.