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Currently, GMT begins on the last Sunday in October, when clocks go back one hour at 2am (meaning an extra hour in bed) and runs until British Summer Time (BST) starts on the last Sunday in March, when clocks go forward at 1am.

Sleep scientists are calling for the end of the annual custom of changing the clocks. They believe that sticking to Greenwich Mean Time (GMT) or Standard Time year-round, which we revert to when the clocks fall back at week's end would be more beneficial for our national health.

Daylight Saving Time simply refers to the act of changing our clocks to make better use of the daylight hours offered in summer. The autumn clock change tends to be more popular as it means we gain an extra hour in bed, in contrast to spring when we potentially lose an hour of sleep.

A handy way to remember this is by saying the clocks ‘ spring forward’ and ‘ fall back’ - so this Sunday the clocks are set to go back, meaning we get an extra hour in bed and signalling the start of autumn. Woo: spooky season, hot chocolate, scented candles. Boo: nosediving temperatures, time running out to sort out your Christmas shopping.

Summer is officially over and that means that this month, the clocks will go back. It happens each year at the end of October, although not always on the same date. The Government's guidance explains: "In the UK the clocks go forward one hour at 1am on the last Sunday in March, and back one hour at 2am on the last Sunday in October.