I came across an interesting article on the BBC website.
It is about an app “what3words”.
The team behind it have divided the whole planet into 57 trillion boxes, each of them 3 metres by 3 metres.
Each box has a been given a unique 3 word reference. Much more exact than a postcode, which of course only works if you are somewhere the postal service will deliver to.
If you are up a mountain, or along a canal, or just lost, then you won’t be able to find out your postcode, but this app will tell you exactly where you are, and, more importantly, help other people to find you.