At the top is a new restaurant which offers visitors one of the greatest panoramas of London, past the pepperpot dome of the National Gallery, over Lord Nelson's shoulder in Trafalgar Square and on to the Palace of Westminster.
But in a show of force, police cruisers with blinking red lights were lined up in the middle of Times Square on Thursday afternoon, and uniformed officers stood shoulder to shoulder.
Abdelkader appeared to catch Lydman square in the side of the head with his left shoulder, and he was given a major penalty for charging and a game misconduct with 4:49 remaining in the second period.