When Does British Summertime Start In 2025. Although astronomical summer begins on june 20 in 2024, there are two. Top credit card firms face lawsuit which could be worth £4bn;

British summer time (bst) occurs on the last sunday of march and represents the phenomenon when the clocks go forward in spring by one hour and, in autumn, on the last sunday of october, reverts to greenwich mean time. British summer time (bst) twice a year, (the last sunday in march and the last sunday in october) the clocks change.