Shoppers will only wait for 6 minutes in a queue before giving up.

A new study found that people are also unlikely to join a queue of 6 people or more -  but if there are 6 people behind you, the feeling of impatience virtually disappears!

And there are a few queuing no nos; skipping is the ultimate faux-pas, talking is also viewed as socially unacceptable and if someone offers you the chance to go ahead of them - it's impolite to refuse.