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History. Until the advent of the railways, the United Kingdom used local mean time. Greenwich Mean Time was adopted first by the Great Western Railway in 1840 and a few others followed suit in the following years.
Greenwich Mean Time is defined in law as standard time in the following countries and areas, which also advance their clocks one hour (GMT+1) in summer. United Kingdom, where the summer time is called British Summer Time (BST) Ireland, where it is called Winter Time, changing to Standard Time in summer. Portugal (with the exception of the Azores)
This is a timeline of British history, comprising important legal and territorial changes and political events in the United Kingdom and its predecessor states.
The history of the United Kingdom began in the early eighteenth century with the Treaty of Union and Acts of Union. The core of the United Kingdom as a unified state came into being in 1707 with the political union of the kingdoms of England and Scotland, into a new unitary state called Great Britain.
This is a timeline of English history, comprising important legal and territorial changes and political events in England and its predecessor states. To read about the background to these events, see History of England .
Early history. British Summer Time was first established by the Summer Time Act 1916, after a campaign by builder William Willett. His original proposal was to move the clocks forward by 80 minutes, in 20-minute weekly steps on Sundays in April and by the reverse procedure in September. [7]
Railway time. Clock on The Exchange, Bristol, showing two minute hands, one for London time ( GMT) and one for Bristol time (GMT minus 11 minutes). Railway time was the standardised time arrangement first applied by the Great Western Railway in England in November 1840, the first recorded occasion when different local mean times were ...
History of standard time. During the 19th century, scheduled steamships and trains required time standardisation in the industrialized world. Great Britain. A standardised time system was first used by British railways on 1 December 1847, when they switched from local mean time, which varied from place to place, to Greenwich Mean Time (GMT).
The idea of using atomic transitions to measure time was first suggested by the British scientist Lord Kelvin in 1879, although it was only in the 1930s with the development of magnetic resonance that there was a practical method for measuring time in this way.
This article presents a timeline of events in the history of the United Kingdom from 1800 AD until 1899 AD. For a narrative explaining the overall developments, see the related History of the British Isles .