Worcester college postgraduate accommodation

Does anyone here have any information about how likely it is to get postgraduate accommodation after the first year at Worcester college? The webpage says that the first year accommodation is guaranteed, however, I know after speaking with some postgraduate students that many colleges that state this usually also allow you to live in college accommodation throughout most of your degree. Has anyone here done or is currently doing a DPhil at Worcester? If so what has your experience been with accommodation? Is it also usually the case that you can get accommodation in later years of your degree? Thanks.