A walkout at Lambeth College is due to take place on 4 December following an 83% 'yes' vote for restarting action. UCU members are in dispute over new contracts.
More action is planned for 9-10 and 15-17 December, with further strikes possible after Christmas unless management proposals change.
New contracts include two weeks less holiday, massive sick pay reductions and extra teaching time for no extra pay.
The principal has now said the new contract will not apply for existing staff - a result of the five week long strike in June and July. But members believe further action can win a victory for all staff.