University and College Union official Liz Martins said the quality of courses would decline and predicted a crisis.
The college said a package of measures would improve standards and that the staffing situation would soon improve.
Harlow College principal Colin Hindmarch said a range of steps were being taken to improve standards of attainment at the college. He said: "Almost 80% of our teaching staff are set to get a pay rise to reflect the new terms.






