The \’joint\’ appearance that lays bare the depth of William and Harry\’s feud: Brothers will address Princess Diana memorial event in London tonight… but the Duke of Sussex\’s videolink will only start AFTER the Prince of Wales has left the building

Prince Harry is set to appear by video call at a memorial event for Princess Diana in London today. The Duke of Sussex is pictured at an NHL hockey game in Vancouver

Prince William will also appear at the Diana Legacy Award event at the Science Museum in London later today. The Prince of Wales is pictured arriving for the 2024 Commonwealth Day Service on March 11

Princess Diana, pictured with Prince William and Prince Harry on holiday in Majorca, Spain on August 10, 1987

The Diana Award is a charity set up to reflect the Princess of Wales\’ belief that young people have the power to change the world.

The charity runs anti-bullying and mentoring programmes and recognises young people\’s inspirational work.

Dr Tessy Ojo, chief executive of the Diana Award, told The Times: \’It\’s a privilege to have the support of both the Prince of Wales and the Duke of Sussex — particularly as we mark our 25th anniversary year.\’

While a spokesman for the award told The Telegraph that Harry will be a \’key part\’ of the celebration.

\’He is scheduled to speak with the award recipients, virtually, on the evening of the awards to celebrate their accomplishments,\’ he said.

A Kensington Palace spokesman said: \’The Prince [of Wales] will meet key staff and supporters of the Diana Award, before joining the ceremony where he will hear about the recipients\’ work, make a short speech and present Legacy Awards to this year\’s winners.\’

The legacy award was introduced by The Diana Award in 2017 to celebrate the life of Diana, Princess of Wales, on the 20th anniversary of her death.

For most of their lives, the royal brothers have been close, united by the shared trauma of losing their mother who died aged 36 in a 1997 Paris car crash when William was 15 and Harry was 12.

But since Harry\’s 2018 wedding to his wife Meghan Markle, relations between them have soured.

An explosive interview that the couple gave chat show host Oprah Winfrey in March 2021 marked a new low, while anecdotes about their relationship in  Harry\’s bombshell memoir, Spare, which was released last year, also saw them grow further apart.

It comes as Prince William\’s wife Kate is understood to be recovering well after undergoing a major abdominal surgery in January.

However, earlier this week she has been the subject of intense speculation and conspiracy theories in recent weeks – and found herself in a social media storm after after admitting to editing a Mother\’s Day family photograph.