Arsenal, Liverpool Street, Lambeth North, Cannon Street, Charing Cross, Regent's Park ... These are all stations which have been forced to close because RMT and TSSA members are refusing to do overtime in protest at London Underground's proposed job cuts.

At other stations, London Underground is losing revenue as gatelines are left open and ticket offices closed, with passengers being allowed to travel without paying. Other stations are staying open only because managers are doing Supervisor or even CSA duties. London Underground can not sustain this way of working, and we will soon see even more stations close.

Our overtime ban is designed to make London Underground face the consequences of its understaffing. In preparation for cutting 800 jobs, LU has already left several hundred stations jobs vacant and until now, has relied on overtime to cover enough of the uncovered duties to keep the stations open.

RMT General Secretary Bob Crow said: "The overtime ban is of vital importance in this dispute. With the already insufficient staffing levels the system essentially can’t function properly without staff volunteering for overtime. I urge members to continue to refuse overtime to keep up the pressure on management to meet our demands."