Ted Heath and the three day week he imposed in 1972 made a major contribution to the birth of UK phone in radio. TV switched off at 10pm and a nation left short of power, petrol and post deliveries now had only Radio available as its major source of broadcast information and entertainment.
My first radio station was BBC Radio London and my night time phone show was born to fill the early TV shut down slot.
To coincide with the stations 45th birthday (and a change back to its original name), Vanessa Feltz invited me back to the station to chat about those very early UK phone in show days.
You may well remember them.