The first British television broadcast was made by Baird Television's electromechanical system over the BBC radio transmitter in September 1929.
On November 2, 1936 the BBC began broadcasting a dual-system service, alternating between Marconi-EMI's 405-line standard and Baird's improved 240-line standard, from Alexandra Palace in London, making the BBC Television Service (now BBC one) the world's first regular high-definition television service.
To Be Continued......

