Prince Harry and Meghan Markle have the option to travel to London from their California home for the Jubilee celebrations on the first weekend in June, which marks the Queen's 70 years on the throne.
They are welcome to join in familial events such as Trooping the Colour, a military parade watched by the royal family on the palace balcony, and a service of thanksgiving at St Paul's Cathedral, according to the Telegraph.
But because they are not currently working members of the royal family, the royal couple will be left out of some events, the publication reports.
The Sussexes have not confirmed whether they have accepted the invitation. There has been speculation about whether they would return to the UK after Harry did not return for Prince Philip's memorial service in April.
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In September, Harry appealed for a judicial review of a government decision that barred him from personally paying for police protection while in the UK, Insider reported in January.
"The Duke and Duchess of Sussex personally fund a private security team for their family, yet that security cannot replicate the necessary police protection needed while in the UK. In the absence of such protection, Prince Harry and his family are unable to return to his home," read a statement issued by the prince's spokesperson at the time.
Representatives for the Duke and Duchess of Sussex and Buckingham Palace did not immediately respond to Insider's request for comment.
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