This is a phenomena of mob violence which has been stoked up by individuals and social media.
PSNI Chief Constable Matt Baggott added it was fortunate nobody had been killed or seriously injured last night, and he praised police for doing a "magnificent" job.
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A bronze drum, alongside a plaque for Fusilier Rigby, will be located at Middleton Memorial Gardens.
The desk, where the author wrote Great Expectations and his last, unfinished novel The Mystery of Edwin Drood, will go on permanent display.
We spring forward an hour at 1am on Sunday, to mark the start of British Summer Time.