A High Court ruling raises serious concerns about unregulated psychological evidence in family proceedings

A psychologist whose advice led to the removal of at least a dozen children from their mothers care has had her evidence thrown out in a landmark case.

In a judgment delivered by Mrs Justice Judd, the court ruled that psychologist Melanie Gill’s assessment failed to meet the necessary evidential standards. The decision is expected to have significant implications for other family cases in which her opinions were relied upon.

Background: Controversial evidence in parental alienation cases

Ms Gill has given expert testimony in over 150 family law disputes, often involving allegations of parental alienation - a contested concept suggesting that one parent can manipulate a child into rejecting the other.

Critics argue that such assessments frequently lack a reliable scientific foundation and risk unfairly targeting mothers in complex contact disputes. The High Court agreed, finding that Gill’s evidence was “unreliable” and “should not have been relied upon.”

In the case before the court, two children were removed from the mothers care after Gill described her as a “narcissist” who had alienated her children from their father. The mother was granted fortnightly supervised contact for years as a result of that assessment.

The human impact

The mother, speaking after the ruling, described the devastating emotional cost of the decision:

“The damage caused by Melanie Gill will stay with me and my girls for a lifetime. I’ve missed out on all their milestones, school plays, birthdays, graduations.”

Her experience highlights the profound consequences of flawed expert evidence in family court decisions, particularly where children are removed from parents based on untested psychological theories.

A wake-up call for the family justice system

The High Court’s ruling has prompted calls for a review of all cases in which Ms Gill acted as an expert witness. It also raises urgent questions about how expert witnesses are accredited and instructed in family law proceedings.

Ensuring fairness and accountability

This case serves as a critical reminder of the duty of care owed by professionals involved in children cases. When expert evidence plays a decisive role in determining custody , the courts must ensure it meets the highest standards of integrity, independence and professional qualification.