 On being given the order, the BBC and ITV were to suspend normal programming, broadcast the frequencies for the Wartime Broadcasting Service and go off-air an hour later (with television used only to broadcast "Protect and Survive" public information films and unavailable after an attack due to its susceptibility to electromagnetic pulse).At this point, one single national programme would have been broadcast on BBC Radio 4 from Wood Norton.This would have consisted of official government announcements and information interspersed with filler material, such as music, news and warnings.