Former Metropolitan Police sergeant Graham Wettone has told Daybreak that the Margaret Thatcher death 'party' due to take place on Saturday has been "planned for years".
Mr Wettone, who has dealt with many significant public disorders, said he was "hopeful that tomorrow will be a peaceful event in the capital."
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Emmerson Mnangagwa was not hurt in the explosion and was evacuated, however, witnesses reported several others were injured.