The Queen will lead a remembrance service in the capital today as she lays the first wreath on the Cenotaph at Whitehall.
The event is the focal point of the country's Remembrance Sunday ceremonies and will see other senior royals, Prime Minister David Cameron and London Mayor Boris Johnson also leaving floral tributes at the memorial.
After the wreath laying ceremony and two minute silence at 11am, more than 10,000 military veterans and civilians will march past the Cenotaph.
More top news
The officer tried to hold off the group at Finsbury Park - where Drake and Mary J Blige were headlining.
The image, taken at the weekend, shows the man making his way past Big Ben with a girl perched on his shoulders waving an ISIS flag.
It was the moment the International Olympic Committee president broke French hearts and gave the 2012 summer games to London.