BBC Archive on Instagram: "#OnThisDay 1964: A major power cut across parts of London meant that the launch of new channel BBC Two didn't go quite as planned. Presenter Gerald Priestland bravely took to the air, reading a news bulletin from the BBC Two studio at Alexandra Palace. This was the only programme broadcast on the channel that day, with 'normal' transmissions beginning in earnest the morning after. Clip taken from BBC News Special, originally broadcast on BBC Two, Monday 20 April 1964.