Prince Harry supported a good friend as he stepped out in London on Monday, July 6, marking his first outing of his latest U.K. visit.

The Duke of Sussex, 41, was pictured smiling alongside Misan Harriman, 48, at the premiere of his new documentary, Shoot the People.

Harriman has been close to Harry and his wife, Meghan Markle, 44, for years, with the photographer and filmmaker taking the photo in which the couple confirmed they were expecting baby No. 2 in February 2021.

Harriman also accompanied Harry and Meghan on their tour to Nigeria in May 2024.

On Monday, Harry was pictured smiling alongside Harriman while celebrating his longtime photographer’s U.K. documentary release. The pair were also joined by filmmaker Andy Mundy-Castle, as well as British writer and broadcaster Afua Hirsch, in one snap that was shared by Watermelon Pictures on Instagram.

Harry’s spokesperson told PEOPLE of Harry, “He was at last night’s premiere to support his good friend Misan and his brilliant new film Shoot the People.“

The spokesperson added on Tuesday, July 7 that the Duke of Sussex “was in good form last night,” after he arrived in the U.K. on Monday afternoon.

“He’s really happy to be back in the U.K. and really looking forward to the week’s engagements,” they continued to PEOPLE.

Catherine Mayer, author of Divide and Rule: Royal Women and Their Battles, which features a chapter on Meghan, also attended the event, but didn’t see the prince.

It appeared to be a casual evening — and in stark relief to the controversy about where Harry might be staying and the security issues he faced that had preceded his arrival.

Mayer told PEOPLE, “This was the inverse of a typical royal event, no red carpet, tickets available to the public, and no hints in advance of special guests. The only advertised ‘star attractions’ were the subjects of the film, Harriman and the activists he documents.”

Harry’s outing came after PEOPLE confirmed that Harry was back in his home country, once again without Meghan and their children, Prince Archie, 7, and Princess Lilibet, 5.

He’s set to attend a week of appearances linked to some of his longstanding charities, including the one-year countdown festivities to the 2027 Invictus Games in Birmingham.

Before Harry’s arrival in the U.K., he spent some time vacationing in Europe with Meghan and their children.

After initially announcing that the couple would bring their two kids back to the U.K. for their first visit since 2022, PEOPLE learned on Saturday, July 4 that Harry’s wife and children would not accompany him to London. No decision has yet been made on whether the family will join Harry for other parts of his visit outside the capital city.

The family’s plans for the U.K. trip have been complicated by ongoing questions surrounding security. Harry and Meghan lost their automatic police protection in the U.K. after stepping back as working members of the royal family in 2020 and relocating to California. The Duke of Sussex has been campaigning to reinstate his security since.

PEOPLE understands that a long-awaited review of Harry’s security by the Executive Committee for the Protection of Royalty and Public Figures (RAVEC) is still ongoing.

On Monday, PEOPLE reported that an offer for the Duke of Sussex to stay at Buckingham Palace during his U.K. visit had been “withdrawn,” shortly after the BBC first reported that he had accepted an invitation to stay at the royal residence during his visit.

A spokesperson for Prince Harry said in a statement on Monday, “I am aware of multiple briefings from Buckingham Palace last week suggesting that the Duke had not accepted the offer of accommodation at a Royal Residence.”

“Following RAVEC’s decision not to provide security for his family, the Duke spent last week making alternative security arrangements. Once those arrangements were in place, he was able to formally accept the offer of accommodation for himself over the weekend,” the spokesperson added.

“It is therefore disappointing that the offer has now been withdrawn, with Tuesday’s judgment in the Associated Newspapers Limited case cited as the reason. Buckingham Palace has, however, been aware of that judgment since last Thursday. It is therefore unclear why, having formally accepted the accommodation offer, it has now been withdrawn at the last moment,” the statement continued.

Royal sources said that Prince Harry had until the end of last week to accept the offer, so that the Royal Household staff could prepare for him. It is believed that he declined the invitation on Saturday and then accepted later on in the day.

Palace sources disputed Harry’s team’s statement, saying he failed to respond by the required deadline and that a later request to accept the offer came only after arrangements could no longer be made.

Harry’s team had spent several days exploring ways they could make the visit work, with increased private security packages.

Although King Charles offered the family accommodations on a royal estate, it was revealed that the security arrangements would not extend beyond the property.

In a statement shared with PEOPLE on June 29, a spokesperson for the Duke of Sussex said, “The issue is whether appropriate and proportionate protective security is being provided throughout the entirety of the visit.”

At the time, the spokesperson said Prince Harry was continuing to “explore every available option to enable the visit to proceed safely and to give his children the opportunity to enjoy the U.K.”

Last year, Prince Harry told the BBC he “can’t see a world” in which he would bring his family back to his home country without the police protection he has long sought to have restored.

“The things that they’re going to miss is, well, everything,” he added of his children. “I miss the U.K., I miss parts of the U.K., of course I do. I think that it’s really quite sad that I won’t be able to show my children my homeland.”