Queen Elizabeth II, the longest-reigning monarch in British history, has died at the age of 96. Across the country, concerts have been cancelled, sporting events delayed and a number of train and postal strikes axed.
The death of the nation’s longest-reigning monarch is set to be reflected everywhere - as millions of people mourn Her Majesty's death.
Officials pinned a notice to the gates of Buckingham Palace, as crowds gathered outside to mark her passing. Across the UK, there will be a lot of changes as the country enters ten days of mourning - in detailed plans codenamed Operation London Bridge.
Read the latest on the Queen's death here
Amongst the changes you may notice, with many detailed here, the radio playlists are expected to stay 'calm' and 'inofffensive'.
According to a report in the Guardian detailing the intricate plans, it may have been the first sign for people in traffic that something was wrong - as DJ's changed to sombre tunes ahead of the announcement.
When a special blue light in the radio station flashes, producers know it's time to switch up the music to something somber, ahead of a big announcement.
In the report, it notes that every station will have prepared music lists for the period of mourning - meaning you may notice a change from the usual tunes.
According to the Sunday World, the BBC will be required to removed all of its comedy programmes during the mourning period, and male presenters will wear black ties.
The Guardian report says: "When the news breaks, these lights will start flashing, to alert DJs to switch to the news in the next few minutes and to play inoffensive music in the meantime.
"Every station, down to hospital radio, has prepared music lists made up of “Mood 2” (sad) or “Mood 1” (saddest) songs to reach for in times of sudden mourning.
"If you ever hear Haunted Dancehall (Nursery Remix) by Sabres of Paradise on daytime Radio 1, turn the TV on,” wrote Chris Price, a BBC radio producer, for the Huffington Post in 2011. "Something terrible has just happened.”"
At 6.31pm, Buckingham Palace said in a statement: "The Queen died peacefully at Balmoral this afternoon. The King and The Queen Consort will remain at Balmoral this evening and will return to London tomorrow.”
Half an hour later, Charles, who has become King on the death of his mother, said: "The death of my beloved mother, Her Majesty The Queen, is a moment of the greatest sadness for me and all members of my family.
"We mourn profoundly the passing of a cherished sovereign and a much-loved mother. I know her loss will be deeply felt throughout the country, the Realms and the Commonwealth, and by countless people around the world.
"During this period of mourning and change, my family and I will be comforted and sustained by our knowledge of the respect and deep affection in which the Queen was so widely held.”
You can leave your tributes to Queen Elizabeth II here
