Prince Harry has claimed that he was “afraid” to return home to the United Kingdom for his grandfather Prince Philip’s funeral last month because London is a “trigger” for his anxiety attacks.

Harry made this claim on his new Apple TV mental health documentary The Me You Can’t See, which he worked on with Oprah Winfrey.

“For most of my life I’ve always felt worried, concerned, a little bit tense and uptight whenever I fly back into the UK, whenever I fly back into London,” Harry said in the series, according to Daily Mail. “And I could never understand why. I was aware of it, I wasn’t aware of it at the time when I was younger, but after I started doing therapy stuff I became aware of it.”

“I was like, why do I feel so uncomfortable?” he added. “And of course for me London is a trigger, unfortunately, because of what happened to my mum, and because of what I experienced and what I saw.”

Prince Harry and @Oprah team up to tackle mental health stigmas in the new series for @AppleTVPlus, #TheMeYouCantSee. Harry also reveals some of his own emotional triggers and how he’s learned to cope.

Full story by @aliciar: https://t.co/y7PWl821zL pic.twitter.com/yXNCKqR9nx

— AP Entertainment (@APEntertainment) May 21, 2021

Harry was then filmed having a therapy session as he showed off the eye movement desensitisation and reprocessing (EDMR) technique that he uses to treat the travel-related anxiety attacks. During the session, Harry was seen closing his eyes, crossing his arms, and tapping his shoulders as psychotherapist Sanja Oakley told him to focus on the “negative thoughts.”

“Happens every time,” Harry told Oakley. “I can’t remember the first time it happened, I can just remember the feeling, anxiety, like a hollow empty feeling almost of nervousness, is it fear? Everything feels tense. It’s being the hunted, and being helpless and knowing that you can’t do anything about it. There is no escape. There is no way out of this.”

In an interview to promote his new series, Harry claimed he was “afraid” to go back home for Philip’s funeral last month.

“I was worried about it. I was afraid about it,” Harry said. “But then going through the motions and being able to lean on the toolbox and lean on the learnings that I’ve grown from over the past. It definitely made it a lot easier. But the heart still pounds. That’s a trigger.”