I'm a teacher, and currently work 4 days a week. I have an interview coming up in a new school, for a full time position (it's rare to see 4 days advertised in schools - my current post was full time, and I applied for 4 days after having my dcs which they agreed to). I really want the job, and would do it full time, but in my dream scenario I'd be 4 days like I am now. If they offer me the job, is it OK to ask them then about the possibility of 4 days before I start? Or should I start the job, get my feet under the table a bit and then apply later on?