Prince Harry makes unique request ahead of his return to the UK

However, as a security measure, Harry has requested that the location of the event is not made public until Monday, an insider has claimed.

The source told the Express: "Harry is still very concerned about his security in the UK and his team have asked that the location not be shared with anyone until the day of the event.

"It's one thing for Harry to come over last minute for a funeral or to see family, but completely different when the event is publicised and in the public domain.

"He [Harry] could become a target so the team have ensured that the location only be known on a need to know basis."

It comes as Queen Camilla has warned King Charles against meeting with Prince Harry next week, according to a source.

The Duke of Sussex will be in London on Monday to attend the WellChild Awards.

It has not been confirmed if Harry and Charles will meet during his time in the UK.

In February, the father and son held a 45-minute meeting at Clarence House after Harry rushed back to the country of his birth following the news the monarch had been diagnosed with cancer.

Harry has made two trips to the UK since then, including in August for his uncle's funeral, but has not seen King Charles during either of them.

However, the King's wife Queen Camilla does not want the monarch to hold a meeting with his son, according to an insider.

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King Charles is still receiving treatment for an undisclosed form of cancer.

They told the Daily Beast: "She has been the principal voice urging Charles to slow down and take things easy.

"The last thing she wants him to do is to get stressed out over a meeting with Harry."