I’m frequently reaching for tools as there’s always something to repair, update, or make in this old house. It’s surprising how much of a difference it makes to simply reach for it rather than squat down and rummage through a bin or drawer.

The solution they came up with was something so simple it’ll make you wonder why no one had thought of it before – the first safety checklist – and it worked. Using the checklist, the Flying Fortress bomber would be flown for 1.8 million miles with not a single accident from ‘pilot error’. It would go on to help the Allies win the Second World War,