Dignitaries and war veterans have been at City Hall for it'sannual remembrance service.
Mayor Boris Johnson was among those who laid wreaths to rememberthe capital's war dead.
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The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.