Vehicles have been barred from Oxford Street and Regent Street on selected dates in recent years.

BBC: Shoppers in Oxford Street in central London

Foot traffic in West London, which includes the Oxford Street and Regent Street shopping areas, was down 12% on Saturday from the same day the previous week.

WSJ: Social Media

The Metropolitan Police have issued the pictures taken from cameras in the Regent Street and Oxford Circus area of London on Thursday 9 December.

BBC: Student protest footage released by Met Police