Much more normal is 'good news' and you will be offered a place on the course. This offer may be 'unconditional' or may have conditions, the most common being that you complete your current course of study. Sometimes, before the final size of the class has been agreed and at times of high numbers of applicants, you may be allocated a place on a 'waiting list' until the final availability of places is agreed. The number of teachers trained in any particular subject in each year is subject to Government guidance. If a waiting list is in operation, you will be informed of this on the day of the interview.
Interviews can be a nerve-wracking experience.
Try not to see our process as highly competitive, but rather a process which tries to find out if teaching RE is for you. It wouldn't be in your interests, or those of potential future pupils, if we train people for a career which just isn't right for them.