IT'S that time of year again when the days start to get longer and flowers are blooming.

That's right, tomorrow is when the clocks spring forward one hour.

The UK switches to British Summer Time at 1am with most mobiles phones and radio-controlled clocks making the change automatically.

The clocks always go forward an hour on the last weekend in March and fall back on the final weekend of October.

This was introduced during World War One by Germany and Austria to save on coal usage.

George Vincent Hudson, a New Zealand entomologist in 1895, and British businessman William Willett have also been credited with the idea as a way of getting up earlier and so having more daylight hours after work.

The clocks are set to go back again at 2am on October 25.