Olympic gold medallist Ed McKeever receives a briefing ahead of his participation in the Big Waterways Clean Up Project on the Lea Navigation in East London today.
Three and a half thousand volunteers have taken part in the scheme to tidy up waterways in the five Olympic boroughs.
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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.