A chef who proposed at one of London's busiest tourist hot spots is set to feature in a tech giant's major advertising campaign.

Polly Guy, 41, used the big screens in Piccadilly Circus to surprise her partner Tim Kemp, as she got down on one knee to pop the question.

Polly, who lives in Norwich, has cooked for stars and royalty alike and has featured on television shows including Come Dine With Me.

She met her now-fiance Tim, 50, in a chance encounter 11 years ago in Ber Street and three months later they discovered they were pregnant with their daughter.

Norwich Evening News: The couple first met 11 years ago in NorwichThe couple first met 11 years ago in Norwich (Image: Samsung)

Norwich Evening News: Miss Guy thought the opportunity would be empowering for her as a womanMiss Guy thought the opportunity would be empowering for her as a woman (Image: Samsung)

"We have wanted to get married for so long," Polly said. "But two people in my family have had bad cancers - it just didn't feel right because we were really aware of making sure it was decent."

On March 25, Polly was offered the opportunity to propose as part of a national advertising campaign.

Samsung had planned to light up the billboards in Piccadilly Circus with customers' letters to loved ones for its Notes for the Nation campaign promoting the Galaxy Tab S9 series. 

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The concept was to bring a real couple into central London to stand in front of the display while a huge "will you marry me?" sign flashed in the centre of the screen.

"I knew we genuinely wanted to get married and I thought it would be a bit of woman power," Polly said. 

"I just thought, no, I'm not just going to wait around for him to do it."

Norwich Evening News: She said Mr Kemp looked like 'a deer in headlights' when she got down on one kneeShe said Mr Kemp looked like 'a deer in headlights' when she got down on one knee (Image: Polly Guy)

She said the most nerve-wracking thing was making sure the timings were exact so that she got down on one knee at the same moment the message flashed on the screen.

"It had to happen at 6.40pm on the dot and we only had about 40 seconds," she explained.

"I thought we would run out of time because when I got down and pointed to the screen he looked really confused - literally like a deer in headlights.

"Like a classic Norfolk lad he just kept saying 'are you kidding?' and not really processing that I was genuinely asking him to marry me.

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"But of course he finally said yes and it was absolutely incredible.

"It couldn't have been more public - there must have been more than 100 people clapping and cheering us and the camera guys just rushed forward to hug Tim."

The happy couple celebrated their engagement by treating themselves to a hot chocolate on the way home but hope to plan something much bigger in the coming weeks.