Indeed, Sir

emeraldreeve and I discussed it a while back, and she theorized that their temporary separation had something to do with Alan Turing (http://en.wikipedia.org/wiki/Alan_turing#Chemical_castration). She could explain it better than me, since she's studied this time period, but basically, they were afraid of their own relationship coming to light after Turing's prosecution, so they split up for a bit as a cover. Makes sense to me. But I like your theory, too - it does sound like the sort of thing Bertie would do. :D