 It has been claimed that the commanders of nuclear-armed submarines believing that Britain had suffered nuclear attack were required to check if they could still receive Radio 4 on 198 long wave, and if they could not they would open sealed orders that might authorise a retaliatory strike.As well as news and drama, the station has a strong reputation for comedy, including experimental and alternative comedy, many successful comedians and comedy shows first appearing on the station.Following the six o'clock news from Monday to Friday, the station normally broadcasts a thirty-minute comedy programme.