An original and iconic Rubik’s Cube, covered in trimmed British postage stamps (six different colours to correspond with the six faces), with a delivery address written across the cube. The photograph above shows the Rubik’s Cube before it was jumbled.

Posted in a clear bag labelled “solve me” this item of mail presented a challenge to the Royal Mail, requiring them to solve the cube (or cheat) to find the delivery address. To my surprise, it was solved enough through trial and error to narrow down the address to two possibilities – number 47 or 74. It was delivered with a knock at the door in just under 24 hours.