Dd's offer of employment has been withdrawn following the reference sent by the employer prior to her current one. She has asked to see the reference as she is unaware as to any issues that could have resulted in a poor reference as during her employment there were no issues raised with her, no capability issues,no disciplinary issues and no sickness record issues. Even more concerning is that her former manager seems to have chosen to ignore policy of referring request to HR where policy is to issue a generic reference and to write the reference himself. Dd has a disability and saw OH but other than adapted seating and mouse and keyboard she needed no further adjustments. Any advice please?