Russia, Belarus not invited to Queen Elizabeth's funeral: source

Neither country will be represented at the ceremony in London, following Russia's attacks in Ukraine, putting them among a small group of nations which have been excluded.

Elizabeth II's funeral at Westminster Abbey next week is set to be a huge diplomatic event that poses major security and protocol challenges for organisers at Buckingham Palace and in the British government.

US President Joe Biden has confirmed he will attend, and has reportedly been given permission to arrive in his armoured presidential limousine, known as The Beast.

A leaked planning document this week suggested that other leaders would have to take a bus to Westminster Abbey.

But organisers have since clarified that the leaders of Britain's closest allies will use their own transport.

These include French President Emmanuel Macron and Canadian Prime Minister Justin Trudeau, as well as Japan's Emperor Naruhito, who is expected to make the occasion his first foreign trip since ascending the throne in 2019.

"It will be an extremely busy time and we're confident that world leaders and others that are flying in will recognise this will be a challenging time and an unusual situation," a government spokesman said Tuesday.

Other more controversial invitees include right-wing Brazilian President Jair Bolsonaro, while it is unclear if Saudi Arabian Crown Prince Mohammed is on the guest list, four years after he was linked to the 2018 murder of journalist Jamal Khashoggi.

Spain's former king Juan Carlos I, who abdicated in 2014 in disgrace and lives in exile in the United Arab Emirates, has said he will attend along with his son, the current Spanish king, Felipe VI.

Russian President Vladimir Putin sent a warm condolence message after Queen Elizabeth's death last Thursday, saying she "rightfully enjoyed her subjects' love and respect as well as authority on the world stage."

But he quickly ruled out attending the funeral.