King overtakes Princess Anne as hardest-working member of Royal family

In 2024, the King, who was forced to step back from public-facing royal duties for a few months after being diagnosed with cancer, carried out 353 engagements.

He recently announced that his cancer treatment had proved so successful that from this month he would be “significantly” reducing his weekly treatment as it moved into what Buckingham Palace described as a “precautionary phase”.

Ms Treble’s analysis found that overall, the working royals undertook 2,459 engagements in 2025, up 23 per cent from the 2,001 engagements of 2024.

All of them aside from the Duchess of Edinburgh and the Duke of Kent increased their workload by a significant margin, ranging from Princess Anne’s 10.39 per cent to the Princess of Wales’s 423 per cent, a figure that reflected the fact that she largely stepped back from the public eye in 2024 as she underwent chemotherapy.

Ms Treble told The Telegraph: “If there is one take-away from the data this year, it’s that the working royals are doing OK, for now.

“But their numbers are shrinking – now 10, compared to 16 in 2018 – and there is no avoiding the effect that getting older is having on how much work they can do, and where they can do it.

“Yet, the King is indefatigable. The 533 engagements he did in 2025 were the most he’d done since 2019, when he did 541.”