Still on Shackleton, I thought the setter's original wording was far clearer, and it would have probably saved all the agonising on this site and elsewhere.
On this puzzle, having finished two days ago in almost record time for me, I'm still struggling to fully parse 27a. It looks suspiciously non-Ximenean and more appropriate to the Guardian, but I may have misunderstood it. Can anyone enlighten me?
Another clue surprised me. The Listener has always been meticulous about homophone clues, and the Chambers pronunciation guide has always been the measure of a clue's acceptability. In this case the answer is not pronounced as the clue suggests because the syllabic break occurs after the R. I don't think the final question mark justifies the deviation.