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For many years, Princess Anne topped the "hardest working royal" list, only being beaten to the top spot last year by her brother, the King.

Despite being in her eighth decade, the famously no-nonsense royal, 75, regularly carries out three to five official engagements a day and rarely takes time off. But not everyone is impressed by her work ethic!

In fact, Anne’s daughter Zara Tindall is so concerned that palace sources tell Woman's Day she’s “putting her foot down” in a bid to get her mum to slow down a little.

“Anne might still be working like she’s 25, but her daughter has decided enough is enough,” reports an insider. “She keeps reminding her mother there’s really no need at her age to fill her diary every day.”

Perhaps unsurprisingly, Anne doesn’t agree. As far as the Princess Royal is concerned, she'll work until she’s unable to - just like her late mother, Queen Elizabeth II.