It comes after the Duke of Sussex landed in London for a special ceremony to honour Princess Diana.

The Queen has reportedly invited the Duke and Duchess of Sussex to join the royal family for her Platinum Jubilee next year.
The invitation is seen as an olive branch from Her Majesty after Prince Harry and Meghan Markle stepped down from their royal duties, moved to Los Angeles and criticised the firm in a number of explosive interviews.
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Its understood the monarch has asked the couple to attend attend Trooping the Colour, the Queens official birthday parade, which will form part of the celebrations in June, 2022.
However, it is not yet known whether they will be allowed to appear on the balcony for the traditional RAF flypast.
The Queen, Meghan and Harry pictured on the Buckingham Palace balcony in 2018. Credit: Max Mumby/Indigo/Getty Images
The Duke and Duchess of Sussex have been invited and Im sure the Queen is very much looking forward to seeing them there, a source, with knowledge of the jubilee plans, told Mail on Sunday.
The balcony moment will be decided much nearer the time but theres a limit to how many family members should be on it, and I would have thought that working royals who contribute to the family would be higher on the list than the Sussexes.
The report comes after Prince Harry landed in the UK on Saturday to join Prince William at the unveiling of a statue of their late mother Princess Diana.
The small ceremony on July 1 will be the first time the duelling siblings will have come face-to-face since Prince Philips funeral in April.
The Queen is said to have a close relationship with her grandson. Credit: Max Mumby/Indigo/Getty Images
Its understood the Queen issued the invitation for Harry and Meghan to attend her Platinum Jubilee when she visited him after he landed in London.
The 95-year-old was seen driving to Frogmore Cottage, where Harry is staying with his cousin Eugenie and her husband Jack Brooksbank, a short time after he arrived .
It is quite something. No sooner had Harry been driven from Heathrow to Frogmore Cottage the Queen was on her way down, a source told The Sun.
Im sure they would have plenty to talk about. The Queen would obviously want to see her grandson after everything that has gone on and could take this opportunity to act as the peacemaker.
Prince Harry and William will reunite this week to unveil a statue of their late mother. Credit: Julian Parker/UK Press via Getty Images
The Diana statue unveiling on Thursday will be attended by only a small number of guests, including Harry, William and some of their late mothers relatives.
Neither the Queen or Prince Charles are scheduled to attend.