If anyone in Britain was prepared for the emotional fallout of the death of Queen Elizabeth II, it was the country’s radio DJs and producers.

According to Ben Cooper, chief content and music officer at Bauer Media Audio UK, a company that operates dozens of British radio stations, at the time of the Queen’s death, blue “obit lights” flashed in radio stations around the country. Long-standing protocols, known as “obit plans,” quickly kicked into gear. There would be no more advertisements. No on-air competitions. Prepared playlists flooded the airwaves.

Washington Post