Lemonade is betting that Tesla’s FSD system is safer than human drivers—so much so it’s floated “almost free” insurance for the miles driven with it.

Most are a foam or liquid which is designed to solidify as the air rushes out of the hole in the tyre, creating a blockage that plugs the puncture. Others are kits which use a rubber bung and glue.

You may have learned how to work on cars or maintain your tools from your grandparents, but if you didn't, then you should ...