Many of the British guards passed out as Prince William reviewed the military parade

The heat beat many British soldiers on Saturday when they showed up in woolen jackets and bearskin hats to salute Prince William.

At least three guards fainted during the military parade known as The Colonel’s Review, in which the heir to the throne, an honorary colonel of the Welsh Guards, reviewed more than 1,400 soldiers of the Household Band and Royal Horse Artillery with the King’s forces.

The temperature in London on Saturday was set to reach 86 degrees Fahrenheit.

After that, William chirp“Thank you very much to every soldier who took part in the Colonel’s parade this morning in the heat. Tough conditions but you all did a really good job.”

is later subscriber Several photos of the procession, and wrote that “the hard work and preparation for an event like this is a credit to all involved, especially in today’s circumstances.”

The event was a rehearsal for Trooping the Colour, an annual military parade held every June to celebrate the King’s official birthday. King Charles III will officiate the ceremony on June 17.