The Queen’s return to public duties had been adjusted to avoid any setback to her recovery.
Other events she attended this past week include a reception she hosted at Clarence House for authors shortlisted for this year’s Booker Prize, and a Buckingham Palace reception to celebrate the TV and film industry.
Both engagements were shorter than originally planned.
The Queen’s chest infection came just under a week after returning from a trip to Australia and Samoa with the King. The trip included a stopover in India on the way back.
Announcing the infection earlier this month, Buckingham Palace said: “Her Majesty The Queen is currently unwell with a chest infection, for which her doctors have advised a short period of rest.”
It said she had cancelled her engagements “with great regret”.
The Queen previously missed a week of engagements with ill health in February 2023, when she tested positive for Covid. It was the second time she contracted the virus, having previously had it the year before.