When regular television broadcasting over the BBC finally launched on 30 September 1929, a problem remained. There was only one transmitter available. As a result, for six months the Baird studios were forced to broadcast video and sound alternately at approximately two-minute intervals. After the activation of a new Marconi transmitter at the BBC's Brookmans Park facility, simultaneous vision and sound television broadcasts could begin. The date of the first official sound and vision television broadcast was 14 March 1930. With the Baird/BBC television service now fully on air, the BBC began to plan something ambitious programme-wise—to test the entertainment value of the new service.
The Queen's Messenger
Sometimes erroneously identified as the world's first television play, "The Man with the Flower in his Mouth" was actually the second. The first occurred on 11 September 1928, conducted by General Electric from WGY—their Schenectady, NY station—to test Ernst Alexanderson's 48-line television system. The play was "The Queen's Messenger", a melodramatic piece by London-born J. Hartley Manners. Arguably it was a more adventuresome production than what was later done by Baird and the BBC in that it used three cameras. Director, Mortimer Stewart, mixed the feeds in a control box. However, only four Octagonal GE receivers were tuned in. A short segment of film footage of the production exists and can be viewed below.