History of the British Television Part 1

Here's my research on the History of British Television: (1920's to 1950's)

1920's:

Television in Britain had started when John Baird gave his first public demonstration of  the television to the members of the Royal Institution (in 1926) in his Laboratory located in London. After this Baird again demonstrates the television in 1927, but this time is long distance transmissions of television pictures over the telephone lines. This line was to London then to Glasgow; making it 438 miles long. In the same year Baird makes the first electronic image to which he called: 'Phono-vision'. Soon after that he demonstrates 'Noctovision' (infrared television) to the Royal Institution. A year later he discovers three key-aspects the television: firstly Baird successfully transmits television pictures across the the Atlantic, secondly he demonstrates colour picture on the television, and lastly he again demonstrates stereoscopic (3D) television. Lastly in 1920's Baird begins to broadcas television using the BBC's London transmitter. He also begins to do regular experimental 30 line television broadcasts as there's only one radio transmitter available.

1930's:

In 1930 it was possible to have the 30-line television transmission are made from a new transmitter which was called Brookmans Park. Next year the Gramophone Company (HMV) and Columbia Graphophone Company join together to create a new company called the Electrical and Musical Industries (EMI). On the same Baird broadcasts the first television broadcast. He had done this by using a mirror drum camera on a caravan. Then the BBC takes over program making for the 30 line TV (1932) and they begin to broadcast regular HS programs from Alexandra Palace to places in London in 1936. In between this EMI works on a workable electronic television camera; named 'Emitron'. At the end of the decade (1939) the first major outside broadcast is shown to the public. It was the Coronation of King George VI. There were only an estimate of 20,000 TV sets in Britain at this time.

1940's:
Baird fives the first demonstration of the 600-line electronic television in colour in 1941. When World War 2 ends the BBC re-opens in 1946. When London hosts the 1948 Summer Olympics it is the first broadcaster to home television.

1950's:
First live link is made from away the UK continent to Calais to London (in 1950) laying the foundation for the later Eurovision network. In the next year BBC's TV  North transmitter open's, serving the North of England and next year BBC launch  the Scotland transmitter. When it is the Coronation of Queen Elizabeth II in 1953 it is the biggest outside broadcast to date. Another BBC TV transmitter open in Northern Ireland.
Source: https://blog.scienceandmediamuseum.org.uk/chronology-british-television/