The moment Essex Police jumped into a river in Chelmsford to save a driver at risk of drowning was caught on camera. The officers helped keep the 73-year-old's head above water after his car veered off the road.
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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.