The fan repeated the question, with now the King replying enthusiastically: “Where?” which prompted the crowd to burst into laughter.

Mr Walker answered: “Anywhere, Albert’s Schloss?” with Charles saying: “Thank you so much.”

But that wasn’t the only encounter Mr Walker had with the monarch.

He recalled to Birmingham Live: “I walked around and I could see his security guard wanted to speak to me.

“I introduced myself and he said if you hang out here you can chat to him. I waited around five minutes and Prince Charles came over and asked me what I did and shook my hand.

“He said ‘Good luck with your ventures’.”

Mr Walker said the sweet encounter completely changed his view of the royals.

He explained: “It’s changed my view of Prince Charles. I thought the Royal Family was stuck up. I am all about laughs and jokes. My mates thought I was lying.”