This 35mm screening is part of the French Noir season at BFI Southbank. The film will also be shown at BFI Southbank on November 30th and you can find the full details here.
Chicago Reader review:
Jean-Pierre Melville's existentialized gangster films are one of the glories of the French cinema, American forms played out with European self-consciousness. This 1962 effort stars Jean-Paul Belmondo as an informer on the lam, but plot pales before Melville's detailed noir imagery of dingy hotel rooms, back alleys, and subterranean passages. Melville's love for American films (he was a man of taste as well as talent) was one of the most profound influences on the New Wave generation.
Here (and above) is the trailer.