For more on the British computer industry and why it was a failure despite being world-leading in the mid-1940s, see Marie Hicks' "Programmed Inequality". It's part of the venerable MIT Computer History series.
And now that the war was over all those gurls and those greasy engineers should go back to where they had come from.
Its also similar to the way in the last few months of the war career officers (proper chaps again) who had had a desk job where parachuted in to command positions to benefit thee post-war career