I can provide releant diff at opportune and appropriate time Meanwhile I dont agree with your assessment as to which books are most reliable if youre not acquainted with Ralph Bennett then were not on the same page Id recommmend his work Ultra and Mediterraen Strategy and also his article Ultra and some command decisions Journal of Contemporary History Vol       As for intel provided to Soviets Im fairly certain Churchills selective provision of Ulta intel to the Soviets was strategically selfserving Also its 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  years after the articles 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 theres a preponderence of minutae about mostly sideshow 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