The six things we learned about Harry and Meghan from his candid James Corden interview

Watch: Prince Harry discusses stepping back from royal life in James Corden interview

Prince Harry has opened up about leaving his role as a senior royal, how he relaxes in the evenings and how he knew Meghan Markle was "the one" on their second date.

Harry, 36, gave an extensive interview to his friend and wedding guest James Corden on an open top double decker bus in Los Angeles, which aired in the US overnight on Corden's Late Late Show.

It comes barely a week before Harry and Meghan, 39, are set to give Oprah Winfrey their first sit down TV interview as a couple since they got engaged.

Photos of Harry filming with Corden in LA emerged around 8 February, prompting speculation about what the royal was shooting with the actor turned late night host.

Here's what we learned.

Harry left the royals because of his mental health

The couple gave a few reasons that they wanted to step back from their roles as senior royals when they made their statement in January 2020, desiring to carve a new path.

But Harry has now shared that a big part of the decision was because of his mental health.

He said it was a "really difficult environment" and criticised the press saying it was "destroying my mental health".

Harry said he had needed to move his family away but added: "I will never walk away, I will always be contributing. My life is public service."

Read more: 'It didn’t hurt at all’: Queen calls on all Britons to get the COVID vaccine when they can

He still refers to himself as a royal

Although he has stepped back from his public duties, and has frequently told people to "call me Harry", he will always be a royal, and seems to still think of himself as one.

As Harry and Corden jumped on the bus, Corden asked the prince to pay the fare, with Harry joking: "You know us royals – we don’t carry cash."

He knew Meghan was 'the one' after two dates

Harry spoke about what it was like for Meghan to date a royal, sharing that most dates had to take place at home where they got more time to talk.

He said: "We got to spend an enormous amount of time just the two of us.

"There were no distractions, and that was great, it was an amazing thing. We went from zero to 60 in the first two months."

Asked when he knew she was the one for him, he said: "The second date, I was starting to think this is pretty special.

"It wasn't so much where we went, it was the way we hit it off with each other.

"We were just so comfortable in each other's company."

Harry and Meghan are understood to have spent time together in Africa early on in their relationship, where they were able to have privacy.

It wasn't until a few months into their relationship that they were spotted in person in Kensington, near the palace.

Read more: First project funded by Prince Harry and Meghan's foundation opens on hurricane-hit Caribbean island

A normal night in for Harry and Meghan involves TV in bed

Describing a regular night in, he said: "We do Archie's tea, give him a bath, read him a book, put him down, go downstairs, Meg might cook a meal, might order a takeaway, go upstairs, sit in bed, turn the TV on, might watch Jeopardy, maybe watch a little bit of Netflix."

He also said earlier in the interview that he had barely seen LA since moving to California because he had been in lockdown since he arrived.

Watch: Prince Harry reveals Archie's first word and what the Queen got him for Christmas

The Queen bought Archie a waffle maker for Christmas

Archie, who is now one-and-a-half, is "hysterical" according to the Duke of Sussex, and got a waffle maker for Christmas from his great-grandmother, the Queen.

Harry said: "My grandmother asked us what Archie wanted for Christmas, and Meg said a waffle maker. She sent us a waffle maker for Archie.

"So breakfast, Meg makes up a beautiful organic mix, in the waffle maker, flip it, out it comes, he loves it.

"Now I have waffles for breakfast, bit of yoghurt, bit of jam on top, I don't know if that's the right thing to do, berries, bit of honey, syrup.

Corden replied that he couldn't "get his head around" the idea of the Queen ordering a waffle maker to be delivered to Santa Barbara.

Of Archie, who turns two in May, Harry said: "He has the most amazing personality and is already putting three or four words together, he's already singing songs."

He also revealed his son's first word was "crocodile".

Read more: What to expect from the Queen's Commonwealth Day message - and Harry and Meghan's Oprah interview

They Zoom the Queen and Prince Philip

Asked about whether the Queen can use Zoom, Harry said: "Both my grandparents do, we have Zoomed them a few times.

"They've seen Archie running around.

"But my grandfather instead of pressing leave meeting, he just goes 'doof'," he said miming closing a laptop.

Prince Harry and Meghan moved to LA in March 2020, and then bought their new home in Santa Barbara in the summer.

They announced earlier this month they are expecting their second child, who will be the Queen's 10th or 11th great-grandchild, depending on whether it arrives before or after Zara Tindall's third child.

The couple have signed deals with Netflix and Spotify and they released one podcast in between Christmas and New Year, as they interview stars about their experience of lockdown.