The photographer who captured the car shot of the Prince and Princess of Wales didn't realise that Kate was sitting next to her husband until he looked at the image on a computer.
Jim Bennett had expected to see only Prince William as he made his way to the Commonwealth Day service at Westminster Abbey in London from Windsor.
"We do a little work in Windsor and we were asked by two publications to get an early picture of Prince William going to the service at Westminster Abbey," he explains to HELLO!
"What I didn't realise at the time was that sitting next to him, until we looked at it on a computer, was Kate!"
Jim captured the couple seated in the back of their black Land Rover as they travelled from Adelaide Cottage to Windsor. HELLO! understands that the Princess, who is still recuperating from having abdominal surgery, had a private appointment in the capital.
"The only reason we shot William was because he was going to a job. We'd been given the green light to do that because he was travelling on to Westminster Abbey," Jim says.
The outcry over the Mother's Day photograph of Kate with her children has heightened speculation over other images of the royals, including Jim's car shot.
The photograph Jim took of William and Kate leaving Windsor on Monday
When asked about its authenticity, Jim tells HELLO!: "I've been a photographer for over 40 years, it was important to us because we were asked to get a picture of William, which we did, albeit not the best picture.
"On a scale of one to ten, it's probably the worst picture I've done in ten years, car-shot wise. A situation arose, it had to be grabbed very quickly. If I had taken a proper picture, a good quality picture, looking at that there is no way I'd put a picture out as bad as that if I didn't think it was important.
"The picture of William was good enough, it just so happened that [Kate] was sitting to the side of him even though you can't make her out clearly, you can see she's looking away and it was only the confirmation by their press office that they confirmed that she was in the vehicle with him."
Hours after it was released by Kensington Palace, the Mother's Day portrait was "killed" by news agencies because of suspicions it had been digitally altered.
William took the photograph of Kate with their children to mark Mother's Day
Concerns were raised over a missing part of Princess Charlotte’s sleeve and the misaligned edge of her skirt, with other queries including the positioning of Kate’s zip.
On Monday, Kate issued a statement via social media, saying: "Like many amateur photographers, I do occasionally experiment with editing. I wanted to express my apologies for any confusion the family photograph we shared yesterday caused. I hope everyone celebrating had a very happy Mother's Day. C."
Prince William was pictured on his way to the Commonwealth Day service
Talking about the downside of editing with Photoshop, Jim says: "It is a bit addictive, Photoshop, for everybody. I'm a great aficionado of Photoshop, crop my pictures, I lighten them and darken them, and I send them to the newspapers, that's the end of it for me.
"I could see that somebody that's a keen amateur with the opportunity to play around, it's very addictive. And I'm assuming that's what [Kate's] done. She should've had a little bit more guidance from a professional photographer because they would have spotted there was a problem immediately."
Jim adds: "[As photographers] we're not allowed to do it - we're not allowed to manipulate any pictures apart from a little bit of lightning, a little bit of darkening and that's it.
"To literally change the content, you can't do that. If you're a professional, you don't, end of story, it's a rule that's laid down by everybody, which is a reason why it got pulled."
Timeline of Princess Kate's surgery and health updates
Kate went in for abdominal surgery on 17 January
25 December 2023 – Kate is last seen publicly on Christmas Day
9 January 2024 – Kate celebrates her 42nd birthday, with the King and Queen sharing a behind-the-scenes photo from the coronation to mark the day.
11 January 2024 – William returns to royal duties, meeting rugby heroes Rob Burrow and Kevin Sinfield at Headingley Stadium in Leeds.
17 January 2024 – Kensington Palace announces in a statement that Kate has undergone abdominal surgery at the London Clinic and that William has temporarily stepped back from royal duties to care for Kate and their children.
18 January 2024 – William visits Kate at the London Clinic.
26 January 2024 – King Charles visits Kate in hospital before undergoing treatment for an enlarged prostate.
29 January 2024 – Kate is discharged from hospital and returns home to Windsor to continue her recovery. King Charles also leaves the London Clinic on the same day after his treatment.
7 February 2024 – William resumes royal duties attending London's Air Ambulance Charity gala with Tom Cruise.
10 February 2024 – William and Kate spend February half-term with George, Charlotte and Louis at their Norfolk home, Anmer Hall. Kate's siblings are also pictured on holiday during the school holidays, with James Middleton and Alizee Thevenet flying to the Caribbean with baby Inigo, and Pippa Matthews and her family holidaying on the island of St Barts.
27 February 2024 – Kate said to be "doing well" as William pulls out of King Constantine memorial due to a "personal matter".
29 February 2024 – Kensington Palace addresses social media speculation, reiterating: "We were very clear from the outset that the Princess of Wales was out until after Easter."
10 March 2024 - A photograph of Kate with their three children at home in Windsor is released to mark Mother's Day and to thank the public for their "continued support".
11 March 2024 - Kate publicly apologises for the "confusion" around the photograph as she admitted she "occasionally experiments with editing," after news agencies pulled the image amid claims it had been digitally altered. The Princess is then seen in a car with William as she's driven to a private appointment in London.
19 March 2024 - Footage of William and Kate leaving the Windsor Farm Shop is shared by The Sun and TMZ in the first video sighting of the Princess since surgery.
22 March 2024 - Princess Kate confirms that she has been diagnosed with cancer in a moving video message and is undergoing preventative chemotherapy.
18 April 2024 - Prince William returns to royal duties after spending Easter holidays privately as a family.
10 May 2024 - Prince William says Kate is "doing well" as he visits the Isles of Scilly.
21 May 2024 - Princess Kate is "excited" as Kensington Palace shares update on her early years work with the release of her Business Taskforce's prioritising childhood report.
8 June 2024 - Princess Kate writes letter to Irish Guards to apologise for not being able to take part in the salute at the Colonel's Review.
14 June 2024 - In a personal statement, Kate shares she is making "good progress" and that her "treatment is ongoing and will be for a few more months".
15 June 2024 - Kate makes her first major public appearance since diagnosis at Trooping the Colour.
14 July 2024 - Kate watches the Men's final at Wimbledon with Princess Charlotte and Pippa Matthews.
11 August 2024 - William and Kate congratulate Team GB athletes in a video message after the Paris 2024 Olympics.
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