Two North London police officers today described how they braved freezing temperatures to rescue a woman trapped in her car in a lake in Totteridge.
PCs Ryan Perry and Marc Cash plunged into the water and smashed one of the vehicle's windows, before pulling the woman to safety.
Paul Brand went to meet them.
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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.