Why are all bourbon biscuits identical, with the same imprinted font and the same pattern, even though they’re made by many different companies? The first of this type of biscuit, made by Peek Freans, were not even called bourbons - so how did this consensus come about?
Claudia Vulliamy
• Post your answers – and new questions – below or email them to nq@theguardian.com. Please include name, address and phone number