Police divers from marine support unit are continuing to search the lake in Dagenham where a severed human male leg was discovered.
One of the anglers who made the gruesome discovery at White Hart Lakes says he is "still in state of shock"
He described flipping it over with a stick before he realised what it was.
Detectives are stlll looking into the possibility that the severed limb may be linked to the disappearance of Neil Buchel.
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The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.
The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants