I can provide releant diff at opportune and appropriate time. Meanwhile, I don't agree with your assessment as to which books are "most reliable". if you're not acquainted with Ralph Bennett, then we're not on the same page. I'd recommmend his work Ultra and Mediterraen Strategy, and also his article "Ultra and some command decisions", Journal of Contemporary History, Vol 16, 1981. 

  As for intel provided to Soviets: I'm fairly certain Churchill's selective provision of Ulta intel to the Soviets was strategically self-serving. Also, it's one thing to provide someone with intel that YOU surmise he needs, and another thing entirely to provide intel that he knows he needs. Far as article is concerned, the point is that 10 years after the article's first appearance, reliable Hinsley and Bennett remain conspicuously absent from references, (as is conspicuously absent from the article content the crucial matter of strategy per se); whereas there's a preponderence of minutae about mostly side-show issues, and what one editor has aptly described as "crappy POV pushing references."  In other words, sloppy and partisan editing, whatever the reason or reasons for it.