British Summer Time 2024 Change. The period when the clocks are 1 hour ahead is called british summer time (bst). On 27 october clocks will turn back by one hour, as we change from british summer time (bst) to greenwich mean time (gmt).

British summer time, also known as bst, starts on the last sunday of march and ends on the last sunday of october, which means that it lasts for most of the year. Here’s everything you need to know about british summer time.