Re(3): Listener 4359: Coded Message by The Tall'n IP: 188.8.131.52 Posted on September 6, 2015 at 07:43:59 PM by Ian Simpson
I was actually visiting Bletchley Park on the day this appeared in the paper, though I didn't get to look at the puzzle until some days after. No doubts here that CALAIS was wanted, but I then managed to send in a solution without any highlighting!
Thanks to The Tall'n for an entertaining puzzle. Replies: