The King and Queen showed their interest in environmentally friendly farming and brewing techniques while in Guernsey.
The couple met people from different organisations and businesses in a showcase of Guernsey culture and heritage on the Crown Pier.
Among those displaying their wares were Guernsey Dairy, Le Hechet Farm, Guernsey Seaweed Company, and Guernsey and Herm Oysters.
James Meller, Manager of Rocquettes Cider said the showcase appeared to be very well received by both Their Majesties.
He spent time talking with Queen Camilla, who seemed interested in how they produce their ciders, brandies, and apple juices.
"It went very well," he said. "We explained a little bit about what we're doing with our regenerative agriculture which seemed to go down with her, and strike a chord.
"She had some of our apple juices, which we make from the community apples that they bring to us, so I think that that part of the story was good."
Pictured: Queen Camilla speaking to the Guernsey and Herm Oysters team.
It had been a very long morning for those involved in the display of produce and environmental and cultural initiatives along the Crown Pier, as they had to set up hours before the Royal guests arrived.
Mr Meller said that added to the atmosphere on the day.
"It's been really fun. We've all been here for quite a while with setting up so there's been a chance to chat to other businesses which we probably wouldn't normally get to speak to.
"There's been a real buzz surrounding the whole thing."
That sentiment was echoed by Daniel O'Brien, Head Brewer at the Little Big Brew Co.
He had the honour of serving His Majesty the King with a pint of 'Charles' - a locally brewed golden ale.
Pictured: King Charles III trying a pint of 'Charles'.
"It was quite nerve wracking, I'll be honest," Mr O'Brien said.
"We weren't 100% sure whether he was going to taste the taste the beer at all but he did decide to taste the beer on the day, which is fantastic and he enjoyed it. He said it had a fantastic aroma, which is, as the Head Brewer, it's quite an honour.
"We originally (brewed Charles) last year for his Coronation, and once we found out that he was going to visit we decided to do another batch. We actually sold out the first batch, so we had to do another batch two weeks ago in the time to serve the King.
"(He made) a comment on the aroma, and then we briefly spoke about using British hops, as one of those was used in Charles. We try to source locally and we discussed future plans for growing hops here in Guernsey."
Further along the Crown Pier, a marquee had been set up for a Tea Party attended by invited guests including Jurats and parish representatives, school children, members of Guernsey's Island Games team, faith leaders, charities, arts representatives, Honours recipients, and Duke of Edinburgh award representatives.
Among them was Blanchelande Head Girl Evie Jamison.
She spent time chatting with Queen Camilla about fundraising she has done for her school's two chosen charities - Cancer Research and Les Bourgs Hospice.
"I got to meet a lot of amazing people from other schools who all had girls and boys or other positions who do remarkable things and then we got to speak with Her Majesty the Queen as well," she said.
"I focused on the charity and fundraising aspect of my job as Head Girl.
"We managed to raise about £3,000 pounds this year. She thought that was very good. She was quite pleased because obviously they're very important charities. She was quite impressed."
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