It all started with a slightly skewed phrase that popped into my head one day for no reason... ‘A leopard never changes his spats’. This conjured a comical image of a dapper feline with an immaculate top hat and cane but inexplicably dirty footwear. A children's illustrator could have a field day, I thought.

Building on the theme, I racked my brain for more well-known sayings, and made a rule for myself... each idiom could only be changed by a single letter. And then I came up with a title that explained the concept by almost acting it out — ‘From Idioms to Idiots — How One Letter Can Make All The Difference’.