Greenwich Mean Time subsection 23(3), the same rule applies to deeds and other instruments. During the experiment of 1968-1971, when the British Isles did not revert to Greenwich Mean Time during the winter, the all-year British Summer Time was called British Standard Time (BST). In the UK, UTC+0 is disseminated to the general public in winter and UTC+1 in summer. BBC radio stations broadcast the "six pips" of the Greenwich Time Signal. It is named from its original generation at the Royal Greenwich Observatory, is aligned to Coordinated Universal Time, and called either Greenwich Mean Time or British Summer Time as appropriate for
BBC Radio 4 in eastern and south eastern counties of Ireland, the north of France and Northern Europe. It is also available through Freeview, Sky, Virgin Media and on the Internet. Its sister station, BBC Radio 4 Extra (formerly "BBC Radio 7"), complements the main channel by broadcasting repeats from the Radio 4 archive, extended versions of Radio 4 programmes and supplements to series such as "The Archers" and "Desert Island Discs". It is notable for its news bulletins and programmes such as "Today" and "The World at One", heralded on air by the Greenwich Time Signal "pips" or the chimes of Big