The UC did not take part in the regroupment of the other French Trotskyist groups which took place in 1944 and led to the foundation of the Internationalist Communist Party.
The strain on the UC leading the struggle at Renault and subsequently the independent SDR union there led to its collapse.
After various attempts to revive the UC, a paper, Voix Ouvrière, was launched in 1956 after the Soviet invasion of Hungary and the Suez Crisis.
However, given that texts from VO and LO tend not to be signed by individuals and given also that Hardy has not run for public office his role in the organisation has been obscure.
There was Hardy the Trotskyist militant who ruled his comrades with great discipline and had dedicated his life to communism and to revolution.