Hugh Foss first outlined an attack on Enigma in 1927. By the 30s the enigma had evolved but Dilly Knox broke Enigma as used by the Spanish in 1937 before he learnt of the Polish attacks in 1938. (He had declared the German enigma unbreakable but that doesn't make his contribution trivial.) Knox later created attacks particular to the Italian naval enigma.
Turing is often credited with the lion share of fame for this stuff and its true that he was crucial in breaking german naval enigma which was the hardest used. But that pales into insignificance compared to the breaking of Tunny IMHO.
Any popular story is bound to focus on the people and their love lives more than be a technical piece.
Go to Bletchley Park and bathe in the credit clearly given to all those involved - especially the Poles - as people and not as nationalities.