Police at a vigil in memory of Sarah Everard were "placed in a position where enforcement was necessary", Scotland Yard said amid pressure to explain its handling of the event.
A crowd gathered at Clapham Common to remember the 33-year-old marketing executive but scuffles broke out as police surrounded a bandstand covered in flowers left in tribute.
Four arrests were made for public order offences and breaches of coronavirus regulations.
Report by Thomasl.
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