This is a Playfair puzzle – but I was playing fair. Something that happens in the puzzle month (in Britain) gives the key – and the solution relates to it.
EA HD GI AE PE DH DH OR
CP QH IB CY QE IF BW DH OR
CP QH MP BS EO RA CP EA KX NF KA RU HF US
This proved to be difficult, and remained unsolved for 8 months, a JCC record. It was then cracked by Katie Schilling, Naomi Brown, Charlie Simpson-Lomas and Laila Dar, all superb code crackers, and true JCC Champions.