People spotted the former England captain in the line of mourners near Britain’s Houses of Parliament at lunchtime on Friday. He is believed to have joined the queue at 2 a.m. and to have lined up for more than 10 hours with thousands of others.
Officials temporarily halted people joining the back of the line on Friday after a park at the farthest end became full. People who arrived were directed to holding areas and slowly allowed to join the queue.
The queen is due to lie in state at Westminster Hall in Parliament until Monday morning, when her funeral will be held at nearby Westminster Abbey.
King Charles III has spoken of his late mother’s love of Wales as he addressed the Welsh parliament.
Charles is wrapping up his tour of the four nations of the U.K. with a visit to Cardiff, following previous trips to Scotland and Northern Ireland.
He told members of the parliament, or Senedd, on Friday that Wales “could not have been closer to my mother’s heart.”
He said he felt “immense gratitude for the privilege” of serving for decades as Prince of Wales, the title traditionally bestowed on the heir to the throne. Prince William now has that title.
Charles said: “I am resolved to honor that selfless example, in the spirit of the words by which I have always tried to live my own life: Ich Dien, I Serve.”
The king and Camilla, the queen consort, were greeted by cheering crowds in Cardiff — and by a handful of anti-monarchy protesters. Some carried the flag of Owain Glyndwr, a medieval leader who was Prince of Wales before the title was taken by the English Crown after the English conquest of Wales in the 14th century.