The British General Post Office (GPO) was officially established in 1660 by Charles II and it eventually grew to combine the functions of both the state postal system and telecommunications carrier. In 1969 it was converted from a government department to a nationalised industry. It was finally abolished in 1981. For the more recent history of the postal system in the United Kingdom, see the article: Royal Mail.
Originally, the GPO was a monopoly covering the despatch of items from a specific sender to a specific receiver, which was to be of great importance when new forms of communication were invented. The postal service was known as the Royal Mail because it was built on the distribution system for royal and government documents. In 1661 the office of Postmaster General was created to oversee the GPO. In later centuries the GPO acquired monopoly control of telecommunications and attempted to control the broadcasting industry.
In the mid 19th century there were four branch offices in London: one in the City at Lombard Street; two in the West End at Charing Cross and Cavendish Street near Oxford Street; and one south of the Thames in Borough High Street. *
In the mid 19th century several private telegraph companies were established in the UK. The Telegraph Act of 1868 granted the Postmaster General the right to acquire inland telegraph companies in the United Kingdom and the Telegraph Act of 1869 conferred on the Postmaster-General a monopoly in telegraphic communication in the UK. Overseas telegraphs did not fall within the monopoly. The private telegraph companies were bought out. The new combined telegraph service had 1,058 telegraph offices in towns and cities and 1,874 offices at railway stations. 6,830,812 telegrams were transmitted in 1869 producing revenue of £550,000.
The same principles were applied to telephone, wireless telegraph and wireless telephone services. This latter expansion then incorporated wireless broadcasting which was non-specific in terms of delivery from sender to receiver. At first the GPO referred to all broadcasting transmitters as senders, while individual receivers retained that name. Like the mail, everything was licensed by the General Post Office under the terms of its Royal Charter.
In 1922 all electrical manufacturers were forced by the GPO to create a single licensed British Broadcasting Company (BBC). In 1927, the original BBC was dissolved when a Royal Charter was given to a new GPO licensed British Broadcasting Corporation.
From the start the GPO had trouble with competitive pirate radio broadcasters who found ways to deliver electronic messages to British receivers without first obtaining a GPO license. These competitors were well aware of the fact that the GPO would never grant them such a license. To police these unlicensed stations the GPO evolved its own force of detectives and "detector vans".
Before World War II the GPO faced broadcasting competition from the continent of Europe with stations such as Radio Normandy and Radio Luxembourg aiming their signals at British receivers. After WWII competition was renewed by Radio Luxembourg which was joined in the 1960s by radio stations located on board ships and marine structures, most famously Radio Caroline and Radio London. Unlicensed transmitters also began to appear on land within the British Isles.
The radio regulation functions were transferred to the Radio Authority and later Ofcom.
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