Meghan Markle and Prince Harry are going to Manchester on Monday for the One Young World summit.
The Sussexes will be in the UK and Europe for the next few days – and the royal couple are said to be staying at Frogmore Cottage in Windsor.
This means Meghan and Harry are just half a mile away Prince William and Kate, Duchess of Cambridge.
But senior royals are reportedly keen to avoid Meghan and Harry until the Duke of Sussex's memoir is released.
Prince William and Prince Harry
Gareth Fuller
Meghan Markle is to make a speech in Manchester on Monday
Press Association Images
Alongside a fly-on-the-wall documentary, the book is set to be released later this year.
Despite being so close geographically, The Sun reports that William will not meet Harry as he feels he cannot trust his younger brother not to repeat their conversations.
It comes as Meghan will give a keynote address on Monday.
The Sussexes will also meet a group of summit delegates doing “outstanding work on gender equality”, One Young World said.
The trip comes just days after Meghan’s wide-ranging interview with The Cut magazine in which she said it takes “a lot of effort” to forgive and hinted that she can “say anything”.
The former Suits actor said that “just by existing” she and Harry were “upsetting the dynamic of the hierarchy” before they stepped down as senior working royals in 2020.
After Manchester, the Sussexes will travel to Germany for the Invictus Games Dusseldorf 2023 One Year To Go event which is taking place on Tuesday.
They will then return to the UK for the WellChild Awards in London where Harry will deliver a speech on Thursday.
Their visit to the UK will be the first time they have been back in the country since the Jubilee celebrations in early June, when they attended the service of thanksgiving at St Paul’s Cathedral.
The trip falls in the same week the country's new prime minister is due to be announced and asked to form a government by the Queen.
The monarch will appoint a new prime minister at Balmoral for the first time in her reign.
The 96-year-old, who has faced ongoing mobility issues, traditionally holds audiences with outgoing and incoming premiers at Buckingham Palace.
It is not known whether Meghan and Harry will visit the Queen in Balmoral during their trip.