I dash past this clever bit of copy in Leeds at least once a week and it never fails to snatch my attention and raise a smile in the mind.
It’s a notice under the Canal Road bridge in Armley, Leeds on the Leeds-Liverpool canal:
Just look at it. It’s all in the execution: a perfect symbiosis between copy and context.
The codified message naturally commands your curiosity, and the message is simultaneously clever, and when decrypted, rewarding.