Before revision: The concept dates to the early radio era ; a December 1924 BBC 5NG Nottingham phone-in programme is described in a 1925 Radio Times article : "listeners ... enjoyed the novelty of hearing their own voices taking part".
After revision: The concept dates to the early radio era : a December 1924 BBC 5NG Nottingham phone-in programme is described in a 1925 Radio Times article : "listeners ... enjoyed the novelty of hearing their own voices taking part".