Public and Commercial Services Union General Secretary Mark Serwotka addressed workers outside the British Museum, London, on February 1.

Up to 500,000 workers have gone on strike making it the UK's biggest day of strikes in over a decade.

Another clip shows University College London security guards walking out over a pay dispute.

PCS (Public and Commercial Services Union) general secretary Mark Serwotka joins the picket outside the British Museum as workers walk out over pay, as a massive day of strikes begins with half a million workers, including teachers, university staff, train drivers and public service staff walking out across the UK.

Security guards working at University College London (UCL) stage a protest outside the university as they walk out over outsourcing and pay, as a massive day of strikes begins with half a million workers, including teachers, university staff, train drivers and public service staff walking out across the UK.