Schoolchildren will be invited to help with a 21-gun salute to celebrate the King’s birthday.

A few children attending the celebrations will be chosen at random to help fire the mini cannons under expert supervision to mark King Charles’ 75th birthday.

The gun salute outside Windsor Castle is a perennial tradition of the sovereign’s birthday celebrations and will be accompanied by a special tribute led by Royal Borough of Windsor and Maidenhead mayor Neil Knowles.

The mayor said: “This annual gun salute on the reigning monarch’s birthday is a long-standing Windsor tradition, and this year will be only the second time we’re firing the guns to wish His Majesty a happy birthday.

“This is an exciting opportunity for our younger residents to play a part in the birthday celebrations, with Windsor Castle as the historic backdrop. If your children would like to be involved, simply turn up by 11.40am and they might be fortunate to be picked.”

King Charles III’s birthday is on November 14, with the celebrations this year starting from 12 noon.

The 21-gun salute will take place on The Long Walk near the Brook Street entrance.