An ideal job has come up. It was also advertised about 4 months ago. The job advert is very vague in some aspects which tells me that they could be flexible and are just looking for the right candidate. Especially as it has been advertised before. I'm currently on mat leave and wasn't due to go back to work for another 8 months. This job start is January which is too early for me. If I am the ideal candidate how could I approach them about the start date? On application/ before application/ at interview?