All eyes today will be on the Royal Family, and whether the Queen will be well enough to attend a service of thanksgiving for the Duke of Edinburgh. The memorial at Westminster Abbey for Prince Philip, who died last year aged 99, will celebrate his public service and a "long life lived fully".
Representatives of his charities, including the Duke of Edinburgh's Award, will be in the congregation.
Buckingham Palace had indicated a last-minute decision will be taken as to whether the Queen will attend, but a statement on Tuesday morning said: "The Queen is currently intending to go to the Service of Thanksgiving for the life of the Duke of Edinburgh."
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The Queen is still hoping to lead her family at the high profile and personally significant occasion for her beloved late husband.
Most members of the royal family, including Prince Andrew, are set to attend except Prince Harry and Meghan Markle. Harry put out a statement several weeks ago saying he would not return to the UK from California for the service in memory of his late grandfather due to security concerns.
Others on the guest list also include royalty from across the world as well as several notable people who had long-standing associations with Philip.
The Mirror has reported the guest list will include:
Royal Family
Prince Charles and the Duchess of Cornwall
Prince William and the Duchess of Cambridge
Prince Andrew
Princess Beatrice and Edoardo Mapelli Mozzi
Princess Eugenie and Jack Brooksbank
Prince Edward, S ophie Wessex, Lady Louise Windsor and James, Viscount Severn
Princess Anne and Vice Admiral Sir Timothy Laurence
The Duke and Duchess of Gloucester
Duke of Kent
Prince and Princess Michael of Kent
Other royal guests
King Philippe and Queen Mathilde of Belgium
Queen Margrethe of Denmark
Maria Teresa, Grand Duchess of Luxembourg
Prince Albert of Monaco
King Willem-Alexander and Queen Maxima of the Netherlands
Princess Beatrix of the Netherlands
King Felipe and Queen Letizia of Spain
King Carl XVI Gustaf and Queen Silvia of Sweden
Crown Prince Salman bin Hamad Al Khalifa of Bahrain
Prince El Hassan bin Talal and Princess Sarvath El Hassan of Jordan
Queen Anne-Marie of the Hellenes
Crown Prince Pavlos and Crown Princess Marie-Chantal of Greece
Prince Philippos and Princess Nina of Greece
Margareta Custodian of the Romanian Crown and Prince Radu of Romania
Crown Prince Alexander and Crown Princess Katherine of Serbia
Prince Kyril of Preslav
Other notable guests
Prime Minister Boris Johnson and Carrie Johnson
Dame Floella Benjamin
Baroness Grey-Thompson
Members of the military who were involved in the funeral, including Pipe Major Colour Sergeant Peter Grant and the Grenadier Guards Bearer Party.
Duke of Edinburgh Award representatives along with 500 representatives from his patronages and charities.
The memorial service will be held at Westminster Abbey with t he service being broadcast live on TV and online. BBC One will be televising the ceremony from 10.30am until 12.15pm on Tuesday - with the service available to watch on iPlayer afterwards.
Huw Edwards, the BBC news anchor, will be leading the broadcast. He previously led the coverage of Prince Philip's funeral last year.
