In 1934, he helped Lee found a small Trotskyist group, but later in the year he, Lee and a third comrade Max Basch decided to move to London where they believed there were better prospects for the movement.
In 1934, he helped Lee found the Bolshevik-Leninist League of South Africa, a small Trotskyist group which soon merged with other tendencies to form the Workers Party of South Africa. Later in the year, Grant, Lee and Max Basch decided to move to London where they believed there were better prospects for the movement.