The last day of Charles III's coronation, dubbed the "Big Help Out", was dedicated to good volunteer actions. Kate Middleton, Prince William and their three children - George, Charlotte and Louis - chose to go to the Boy Scouts in Slough, Berkshire.

All day, every Cambridge pitched in with great will, even Prince Louis, who was seen carrying a wheelbarrow full of sand and sitting on his father's lap. "They were very good at archery and seemed to be really having fun," said one of the people present.