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Postal service helps bring about standardised time

In the 1780s, local time varied from place to place, and could not be accurately maintained. The introduction of mail coaches assisted with the development of one, uniform time across the UK. A standardised time system (GMT) was first introduced on the railways on December 11, 1847. The postal service played a huge role in bringing about the change as collections were governed by a uniform time. The vast majority of Great Britain's public clocks were standardized to GMT by 1855.

This predated the international agreement that GMT was standard time and Greenwich zero degree longitude in 1884.

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