The machines that contributed to decrypting Enigma messages were the Bombes. The reference to the first computer is to the Colossus computers that contributed to the decryption of the Lorenz SZ42. The Poles were indeed the first to 'break' the Enigma cipher in 1932/33, but breaking systems such as these is not a one-off activity, it requires repeated efforts to keep up with improvements. By the time Bletchley Park was opened, just before the satrt of WWII, the Poles were achieving very little success, but they gave their secrets to the British and French, which enabled full-scale decryption to resume after a few months.