This was not a union strike but an unofficial wildcat action by station staff, not drivers

SPT spokesman

The 1945 BST kick-off was put back 15 minutes because of the unofficial action.

Maintenance staff working in the station walked out over a disciplinary matter leaving the ticket dispensers in a state of disrepair.

A spokesman for the company said: "Generally about 10% of people who go to Ibrox would take the underground.

"We regret very much the inconvenience caused by the closure, particularly to those at the Rangers match. This was not a union strike but an unofficial wildcat action by station staff, not drivers.

"A ticket machine broke down and staff had to issue tickets manually for a while.

"Then a representative of one of the unions claimed that there was an agreement which said that no-one had to manually dispense tickets for more than two hours."

Last month, three underground stations were closed early to allow staff members to attend a wedding reception for two colleagues.