Dear Ann, My great grandmother died in Claybury in 1922. When I got a copy of her death certificate it showed her place of death (this is important- as it showed the fact that she was a patient at the hospital- therefore this information is then classed as in the public domain) I contacted the hospital, who informed me that as the information that she was a patient there they could tell me some information, but as it was less than 100 years ago this information would be limited. They could tell me the date she entered the asylum, (1915) and also that she was buried at Queens road, Chingford Mount Cemetery, London, they gave me the burial plot, but informed me that several people would have been buried in the same grave, and that it was unmarked. I will have to wait until 2022 to ask for her medical records. Goodluck with you hunt!! Eleanor