On the basis that the information simply isn't available, it doesn't appear in any court publications. eg a recent UK Supreme Court case was: 'R (on the applica

On the basis that the information simply isn't available, it doesn't appear in any court publications. eg a recent UK Supreme Court case was: 'R (on the application of HC) (Appellant) v Secretary of State for Work and Pensions and others (Respondents)' HC here has her name witheld (R is 'Regina', ie the Crown). Exactly the same thing happens in the US; eg in Roe v Wade, 'Roe' (a Jane Doe plaintiff) didn't have her identity revealed until she herself told the press who she was afterwards; the papers still use the pseudonym to describe it. If the identity is known by other means the US press has been known to publish - eg in https://en.wikipedia.org/wiki/PJS_v_News_Group_Newspapers https://en.wikipedia.org/wiki/PJS_v_News_Group_Newspapers, it was a celebrity case and the story had been shopped round various papers, with the result that US tabloids got the story and knew it would sell copies. In this case there's no likely source for a leak.