Hi there. the school you interview at is required by law to take a reference from your current employer before your interview. On this there is normally a section that askes about number of sick days. You will more than likely have this question on your application form too and they will require a brief explanation as to why you were off. I would imagine your school would probably put that you are off at the moment on the reference. Things like this shouldn't go against you in an interview, however I know from experience that some heads are not sympathetic. I used to recruit for secondary schools and worked with several heads and some of them were unbelievable in shortlisting meetings. I actually worked with one head who would not interview mature NQTs or scottish people! He was a joy! You may be required to go through occupational health but your union will be able to advise on that. Anyway depression is still a bit of a taboo subject and some people are suspicious of it. Be really honest about your condition and let them see that you are a good teacher that is suffering at the moment but you will get better. Hope it works out for you.