This discussion, from #83 onwards, raises the question of whether The Listener is actually more difficult to decode nowadays than, say, 50 years ago; in the decades I've been having moderate success with The Listener I've never had less than the Chambers analytical CD as a tool, and latterly for a long time Wiki and Google: My solve rate has gone up from maybe 25% to nearly 100% now, and time for a successful solve from at least a week tp only a few days.
The people who regularly solved it back then, armed only with the cumbersome BRB and without the benefit of any modern search facilities, must have had formidably encyclopaedic general and cultural knowledge; did they use the even more cumbersome Britannica to check? Would we find it easier to solve those vintage puzzles?
Or are we intellectual pygmies in comparison?