The nation is now in mourning following the death of the Queen.
Detailed plans, under the codename 'Operation London Bridge' had already been drawn up for when Queen Elizabeth II sadly passed away.
Mirror Online reports how they include a number of changes to our day to day lives. These include what events are on, where people can shop and what appears on TV.
The 96-year-old's funeral is set to take place nine days after her passing. The day will be a bank holiday and most places will be shut or change their operating hours.
Here is a look at things that will now be closed or cancelled. following the monarch's tragic death.
Shops and the economy
The day of the funeral will be a Day of National Mourning, but employers will not be compelled to give staff a day off.
Unless it falls on the weekend, there will be a national bank holiday, following church services and memorial services across the UK.
The service will take place at Westminster Abbey, and a two minute silence will be held across the UK at noon. Most people will therefore get time off from work on the day of Her Majesty's funeral.
Shops will close or only be open for reduced hours, while banks will of course also be shut.
The London Stock Exchange will be closed for at least the day of the Queen's funeral and possibly for several days after - which could potentially cost the economy billions.
Television
There have been major changes to TV schedules and even what presenters are wearing on-screen.
When news of the Queen's health emerged on Thursday, the BBC cleared its scheduled programming and presenters including Huw Edwards all changed into black outfits.
Coverage of the sad news aired on BBC One, with tributes flooding in as well as footage of mourners outside Buckingham Palace. Her portrait displayed on TV along with the national anthem - as happened when Princess Diana tragically died in 1997.
The BBC will also suspend all comedy programming during the 12-day period of national mourning. Because it is such a major event, the BBC regularly rehearsed how it would respond to the Queen's death, so everything ran incredibly smoothly.
Other channels are not required to interrupt regular scheduling, but many have decided they will to honour the monarch.
From 5pm onwards, ITV interrupted their usual shows for an ITV News Special on the Queen - meaning Emmerdale was scrapped. They also announced daytime TV and soaps will be axed on Friday for special coverage.
Channel 4 also cancelled their scheduled programming, including Katie Price's documentary, and replaced it with extended news coverage.
Strikes
A number of planned strikes have been cancelled, including industrial action by Royal Mail workers on Friday.
Members of the Communication Workers Union were due to continue a 48-hour walkout in a dispute over pay and conditions, but it has now been called off after the Queen's passing.
General secretary Dave Ward said: "Following the very sad news of the passing of the Queen and out of respect for her service to the country and her family, the union has decided to call off tomorrow’s planned strike action."
Transport union TSSA is cancelling planned industrial action for September and will be respecting the period of public mourning.
Avanti West Coast members had been due to strike for three days in a row from September 15-17.
While TSSA members at nine train operating companies and Network Rail were also due to walk out from midday on Monday 26 until midday Tuesday 27 September.
Avanti tweeted: "We are saddened to have learned of the death of her Majesty Queen Elizabeth II and share the nation’s sorrow. Avanti West Coast sends its sympathy to the Royal Household and the nation."
Football
As part of Operation London Bridge, all sporting fixtures look set to be cancelled on the Day of National Mourning. If history is anything to go by, then football matches are likely to be postponed.
When Princess Diana died, the game between Liverpool and Newcastle United that was due to take place later in the day was called off. All football leagues matches which were due to take place on the day of Diana's funeral were moved to the Friday before or the following Sunday.
There was no need to scrap Premier League matches as none were scheduled due to international fixtures. England had a world cup qualifier against Moldova that went ahead 10 days later, with both sides wearing black ribbons as a mark of respect. A minute's silence was also held before kick-off, which is also expected to happen for the Queen.
It is understood football bosses have been told to gauge the 'mood of a nation' when deciding what to do during this period of official mourning.
Manchester United's Europa League game against Real Sociedad is going ahead as planned on Thursday evening. It is understood United would have called the game off if asked, but fans had already started taking their seats in the ground.
The club released a statement shortly after the news broke, which read: "Manchester United shares the sorrow of the entire nation following the announcement from Buckingham Palace on the passing of Her Majesty, The Queen.
"The club recognises her immense contribution to public life, including sport, both here in the United Kingdom, across the Commonwealth, and around the world.
"Everyone connected with Manchester United joins the wider football family in sending our deepest condolences and heartfelt sympathy to The Royal Family."
Arsenal were in Europa League action in Switzerland against FC Zurich when the news broke at half-time, so the players held a moment's silence before the match resumed.
Arsenal's official Twitter account, meanwhile, posted: "We are deeply saddened to hear of the passing of Her Majesty The Queen. Along with many of our supporters today, we will be taking time to mourn and reflect on Her Majesty's incredible life and devoted service."
All 20 Premier League clubs have paid tribute to Her Majesty.
Newcastle United tweeted: "Newcastle United and its owners are deeply saddened by the passing of Her Majesty Queen Elizabeth II. We join the world in sending our deepest condolences to the Royal Family."
Sunderland AFC also posted on Twitter: "We are saddened to learn of the passing of Her Majesty the Queen Elizabeth II. Our thoughts and sincere condolences are with the Royal Family at this difficult time."
Cricket
The test match between England and South Africa on Friday has been cancelled. No decision has yet been made about the remaining three days of play, but all scheduled cricket matches on Friday have been postponed.
In a statement, the England and Wales Cricket Board said: "Following the death of Her Majesty Queen Elizabeth II, Friday's play between England and South Africa Men at The Oval, along with all scheduled matches in the Rachael Heyhoe Flint Trophy, will not take place. For fixtures beyond Friday, updates will be provided in due course."
New ECB chair Richard Thompson paid tribute to The Queen and her support of cricket, saying: "I'm sure I speak for everyone in the game when I say how truly sad I am to hear of the Queen's passing. Her Majesty has been such a great supporter of the game and was always so vocal of her and her late husband's enjoyment around the sport.
"Her dedication to her country will never be forgotten. For her service and her selflessness over her extraordinary reign, we owe her a debt that can never be repaid."
Theatres
Theatres across the country will continue with their performances, but will be dimming their lights and observing a minute's silence. They will play the national anthem and open books of condolences prior to performances as mark of their respect to Her Majesty.
A statement from Society of London Theatre (SOLT) and UK Theatre said they were "deeply saddened" by the news of the Queen's death. The message, from Stephanie Sirr and Jon Gilchrist, joint Presidents of UK Theatre and Eleanor Lloyd, President of SOLT, said: "We are deeply saddened to hear the news of the death of Her Majesty Queen Elizabeth II.
"The theatre industry is thankful for all the support and patronage Her Majesty has shown throughout her lifetime. We would like to convey our deepest sympathy to the Royal Family at this time of national mourning."
They added that, in accordance with advice from the DCMS, scheduled theatre performances will go ahead tonight and during the official period of mourning.
Awards
The Mercury Prize awards have been postponed, despite audience members already being in their seats at London’s Eventim Apollo.
The annual ceremony had been due to start an hour before the news was announced, but organisers told the crowd hey had decided to call off the ceremony "in light of the sad news".
A message displayed on the screen read: "In light of the sad news of the passing of Her Majesty the Queen. we are sorry to announce that we will not be proceeding with this evening's event as planned.
"Mercury Prize will be communicating with guests and audience members over the coming days. We thank you for your understanding at this difficult and sad time.
"Dinner will not be served, we would be grateful if you could finish you drinks and we will be closing the venue at 7.30. We thank you again for your understanding."
Read more:
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The Queen has died: The Palace confirms the death of Queen Elizabeth II
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King Charles III pays tribute to his 'beloved mother' after Queen's death at 96
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The national mourning plans now in place following Queen Elizabeth's death
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Great North Run could be cancelled due to death of Queen Elizabeth II
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Queen's funeral 'expected' to be a Bank Holiday for Brits to pay their respects
