Regarding the reddit thread, and maybe I'm just not good at Reddit, is the only thing they're basing "she had an affair with Cros" on his book? Because his book says nothing of the kind. It sorta leaves space that he might have, but he doesn't say he did. I think SOE was the majority opinion here/HA discord as of episode 6, but some people did think Bletchley park, too.

The Egan/Cleven stuff this episode was gold generally. A+