Prince Harry is reportedly planning to return to the UK next month

According to New York Post column PageSix, Harry is slated to appear at the event on May 8.

It will mark his first trip back to the UK since he made a dash home in February to see his father King Charles following the monarch's cancer diagnosis.

An insider told the publication it's not yet known whether Harry will use the trip to see his brother William, Prince of Wales and sister-in-law Catherine, Princess of Wales following the news she is also battling cancer.

The source said: "Everyone is asking whether Harry will see his father and will he see Kate and the Wales kids - if not his brother? ... "

Another insider added a reunion might be unlikely because of lingering tensions between William and Harry. They explained: "I can imagine that Harry may see his father, and check in, but things are still very fraught with William, this is the real problem."

Reports suggest the brothers have not spoken in more than a year following the release of Harry's bombshell autobiography 'Spare' which laid bare the pair's feud in candid detail.

Harry and Meghan previously released a statement sending their best wishes to William and Catherine after the princess went public with her cancer battle.

They said: "We wish health and healing for Kate and the family, and hope they are able to do so privately and in peace".

Reports suggest the pair had also reached out to the couple privately to extend their sympathies.