RMT picket line: 'Why we are on strike today'
Most London Underground services are not running on Monday, as about 4,000 London station staff from the RMT union take strike action over job losses and pensions.
Many stations - especially in Zone 1 - will remain closed and commuters are being urged not to travel.
At one picket line at Oxford Circus, RMT union member Daniel Randall explained why the strike was taking place.