A job offer has been withdrawn due to an unsatisfactory reference from a previous employer. The reference was made over the telephone and the school who made the offer will not provide me with details as to who provided the reference and why it was unsatisfactory. Obviously I want to find out what was said about me and why, I wasn't expecting this at all. The employer was not my most current, it was a school I left 5 years ago. Any advice on tackling this and preventing it from happening in the future? Is there anything formal I can write to either school to encourage them to disclose details under the data protection act?