On the fifth day following the death of Queen Elizabeth II her body will return to London and the King will travel to Northern Ireland.
Intricate plans were drawn, codenamed Operation London Bridge, for when Queen Elizabeth died, which sees a number of events happen during a period of mourning. On D-Day +4, which is one day behind schedule due to the time The Queen's death was announced in Balmoral, a number of events are expected to take place across the United Kingdom.
Yesterday saw King Charles III make his first address as monarch to MPs and peers in Parliament. Later, he led a procession along Edinburgh's Royal Mile to St Giles' Cathedral, where the Queen's coffin is lying in state. Last night King Charles - alongside Princess Anne and Princes Andrew and Edward - held a moving vigil, standing watch over their mother's coffin.
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Here is the timeline of events expected to take place over the next 24 hours.
Procession of the Queen's coffin
After remaining overnight on public view at St Giles' Cathedral in Edinburgh, the Queen's coffin will leave the church on a hearse at 5pm, bound for Edinburgh Airport. At 6pm, it departs Edinburgh on an RAF Globemaster C-17 flight, accompanied by the Princess Royal and her husband, Vice Admiral Sir Tim Laurence.
Its arrival in RAF Northolt in west London is scheduled for 6.55pm. It will then be transported on a state hearse, accompanied by Princess Anne and Vice-Admiral Sir Tim, to Buckingham Palace. Its route will be via the A40, Eastbourne Terrace, Lancaster Gate, Bayswater Road, Marble Arch, Park Lane, Hyde Park Corner and Constitution Hill.
Waiting to receive the coffin at the Palace will be the King and Queen Consort. The Prince and Princess of Wales will also be present. A guard of honour formed of three officers and 96 soldiers from The King's Guard will be mounted in the Palace Quadrangle.
The Queen's coffin will rest in the Bow Room overnight. Details about the route for the lying-in-state queue will be provided late on Tuesday.
The King's duties
The King and Queen Consort will earlier leave the Palace of Holyroodhouse to fly to Belfast as part of Operation Spring Tide - Charles' tour around the UK's home countries. At Hillsborough Castle, Charles and Camilla will view an exhibition of pictures, showing the Queen in Northern Ireland.
The King will then meet Northern Ireland Secretary Chris Heaton-Harris and party leaders, and receive a message of condolence led by the Speaker of the Northern Ireland Assembly and make a reply. Charles and Camilla will attend St Anne's Cathedral for a service of prayer and reflection.
They are expected to be greeted by thousands of members of the public, who have been encouraged to line the streets of the city in the afternoon. Their royal cavalcade will travel through Wellington Place, Donegall Square North, Chichester Street and Victoria Street.
The King and Queen Consort will then undertake a walkabout at Writers' Square, before leaving Northern Ireland.
Requiem Mass at Liverpool Metropolitan Cathedral
At 7pm The Archbishop of Liverpool, Malcolm McMahon OP, will lead a Requiem Mass at Liverpool Metropolitan Cathedral. The service will give thanks for the life of HM Queen Elizabeth II.
Everyone is welcome to attend and no tickets are required.
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