The GLA will hold its Annual Service of Remembrance for London's war dead in the Chamber at City Hall today.
Mayor of London Boris Johnson and Deputy Chair of the London Assembly, Darren Johnson AM, will be joined by Brigadier Richard Smith CBE, Deputy.
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The tribute has been set up to mark the four terrorist atrocities that took place in the city last year.
Six officers opened fire at a property in Hackney in the early hours of Tuesday morning.
A man in his twenties has died from stab wounds after police were called to a disturbance at the Stratford Centre on Tuesday night.