Don't lay it on the counter, where it can gather other bathroom germs, and don't store it in a travel case, where bacteria can thrive in the moisture.

In this globalised age, there is a good case for international travel, and some parents say they can manage the cost of a school trip abroad more easily than a family holiday.

It's an approximate yardstick but does seem to be the case; the farther north you travel from the bustling seafront towns the farther back you go in time.