The Princess Royal stepped in to present racing trophies after the Duchess of Cornwall cancelled a visit to the Cheltenham Festival.
Camilla has recently recovered from a bout of Covid but has been left with a slight cough and it is understood she is pacing herself after her illness.
The duchess was due to spend the day at the races and present trophies to the winning owner, jockey and trainer of the Queen Mother Champion Chase, but Anne hosted the prizegiving ceremony and her daughter Zara Tindall was also spotted at the course.
On Tuesday she visited the Irish Cultural Centre in west London with the Prince of Wales, and the couple celebrated Irish culture ahead of St Patrick’s Day.
They appeared to enjoy a busy and varied tour of the centre in Hammersmith, with the duchess taking part in all the activities.
But she cancelled an appearance at an evening event on Monday, when she was due to meet High Commissioners and Commonwealth Secretariat staff with Charles. They both attended the Commonwealth Day service earlier in the day.
Last week, the duchess said she has been left with a slight cough in the aftermath of the virus.
When she met a group of record-breaking charity rowers at Clarence House, she told them: “Well, it’s taken me three weeks and I still can’t get shot of it.
“Probably my voice might suddenly go coughing and spluttering.”
Camilla is triple vaccinated but appears to be taking a precautionary approach following the illness which has seen cases rise in recent days.
The Queen has also recently recovered from a bout of Covid and returned to in-person royal events, and her cousin the Duke of Gloucester missed the Commonwealth Day service at Westminster Abbey after testing positive.
