Timeline of radio

1920-Radio broadcasting in the United Kingdom commenced in 1920 from Guglielmo Marconi's trial station 2MT situated in Writtle, Essex. It was the development of the Thermionic Valve in 1906 that enabled Marconi to finally create a dependable 'Carrier Wave' that would transmit voice and music from the trial station 2MT in 1920, rather than the spark-gap carriers that were deployed to create the dots and dashes used by the Morse code indications for the past twenty years.

1922-In October 1922 the government granted the British Broadcasting Company the permit to function and November 14th 1922 saw the ceremonious inaugural of the BBC London station 2LO.
On 15th November 1922 the BBC was registered and the BBC Manchester station 2ZY, was officially opened on 375 meters transmitting
On November 16th BBC Birmingham opened with 5IT transmitting from the General Electric Company works at Witton using 420 meters. BBC Newcastle, 5NO, was the last station to open in 1922 from a transmitter at Eldon Square using 400 meters. These 'main' stations broadcast with a power of 1.5 kilowatts.
BBC Newcastle, 5NO, was the last station to open in 1922 from a transmitter at Eldon Square using 400 meters. These 'main' stations broadcast with a power of 1.5 kilowatts.

1923-On January 17th 1923 the original station 2MT in Essex was closed, but more BBC stations were to be established around the country: BBC Cardiff, 5WA, opened on February 13th on 353m from a transmitter at the Castle Avenue electric works; BBC Glasgow, 5SC, opened using a transmitter at Port Dundas on 420m, while BBC Aberdeen, 2BD, started on October 10th using 459m from a transmitter at the Aberdeen Steam Laundry. BBC Bournemouth, 2BD, opened on October 17th on 385m from a transmitter at North Cemetery, and on the 16th November 2FL Sheffield opened.



1924-saw more expansion with the opening of 5PY Plymouth on 28th March, the 2EH Edinburgh relay of 5SC on May 1st and in June stations 6LV and 2LS were opened to bring a relay of 2ZY to Liverpool and Leeds/Bradford. On September 15th 1924 BBC Belfast, 2BE, was opened. Other relay stations were also opened; 6KH in Hull; 5NG in Nottingham; 2DE in Dundee; 6ST in Stoke on Trent and 5SX in Swansea, which opened on the 12th December 1924.