For whatever reason if you have failed your exams, it is important that you speak to your department ASAP! Meet with your Personal Tutor or the Head of Department to discuss the situation. Assuming that you have not been given a letter of neglect of studies letter or best efforts letter you will be allowed a chance to resit any exam failed on one further occasion.
For details of when you will take the resits and more information regarding what to do if you were suffering from problems that affected your performance during the examinations click on the links below: -