Pictured: King Charles and the Queen Consort send their first 100th birthday wishes

Charles became king after his mother’s deathQueen Elizabeth II, on September 8, and Ms Park-Pearson is one of those who received birthday wishes from the new monarch this weekend.

“I was like, ‘Oh my god, me,'” she said.

“It’s beautiful because it has a beautiful gold cord running through it with a bow at the end.

“It’s a really nice card. I’ll keep it very visible for everyone to see.”

Glasgow-born Mrs Park-Pearson, who plans to put the card on her cabinet, served in the Women’s Royal Naval Service (Wrens) during the Second World War when Charles’ grandfather, King George VI, was on the throne.

Queen Elizabeth has reigned since 1952 until her death in Septemberafter she celebrated her platinum jubilee.

During her 70-year reignapproximately 1.3 million birthday and anniversary cards were sent across the UK, UK and overseas territories.

Mrs Park-Pearson said: “If you think about it, I served under her father.

“I served under him and the Queen and now it will be King Charlessay, three monarchs in my life.

“You don’t think about it at the time, it’s only later that you realize how suddenly old you are. You think, my God, I remember the old king.

“The Queen Mother was a very elegant lady.”