On the mall itself, go to the left hand corner (as in, the corner in the road) and look around it until you get to the 3 officers saluting. Then next to their left is an armed police officer. Then, the next guardsman, stood in front of welsh flag, has the muzzle of an SA80 actually sticking out of his shoulder.
I know body piercings are becoming more acceptable in the forces now but maybe this is a bit far?
He also appears to be stabbing the policeman with his bayonet. The policeman looks very calm.