Justine Roberts, the website’s founder, said that they would have contested the court order if necessary

A High Court judge has ordered Mumsnet to disclose the identity of a user who allegedly abused a transgender activist.

Stephanie Hayden, the activist, tweeted an image of the court order given by Mr Justice William Davis, which compels the parenting website to hand over the user’s full name, address, email address and birth date, if known. She wrote: “The days of defaming, abusing, and harassing transgender people on Mumsnet behind the cloak of anonymity are over.”

The order, issued by the High Court, gives Mumsnet until 4pm tomorrow to provide the user’s details.

The comments, by a user known only as “ALittleHelp18”, have been deleted from Mumsnet. The Times understands that they contained allegations of criminality that Ms Hayden said were defamatory. Obtaining the