Veterans from the D-Day landings are being hosted at a lunch on board HMS Belfast today.
The ship has only recently been re-opened to the public after the gangway collapsed into the River Thames in November 2011.
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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.