Puberty Blockers

Debate between John Hayes and Stephen Kinnock

Tuesday 23rd June 2026 Commons Chamber

[Stephen Kinnock]

This is a debate about hormones for suppressing puberty, and is related to the matter that the hon. Lady raises, but it is important that we get the sequencing right. Let us look at the trial and the evidence. That is part of the process of understanding the milestones and the forks in the road faced by children who are experiencing gender incongruence. Let us do this one step at a time.

We are proceeding carefully, cautiously and under the mantra that the safety and wellbeing of children are non-negotiable, and with clarity that a robustly scrutinised trial with rigorous safeguards is the only way of establishing a robust evidence base for puberty-suppressing hormones.

Many hon. Members have asked about safeguards, so let me remind the House what they are. A child can participate only with the consent of a parent or guardian and the child’s own consent or assent, and only if they have had a diagnosis of gender incongruence for at least two years; if they are of stable physical and mental health; if they are not subject to any safeguarding concerns; if they and their parents demonstrate sufficient understanding of the nature of the treatment, including its potential advantages and disadvantages; if they have been deemed clinically appropriate by both their NHS care team and the national multidisciplinary team; and if they are already accessing NHS gender services, including participation in a tailored package of psychosocial care.

[Sir John Hayes]

Will the Minister at least commit to looking again at the experience of Finland and Denmark, whose evidence has led them to now emphasise counselling rather than medical intervention?

[Stephen Kinnock]

A little later, I will go through all the different work that is going on. This is absolutely not happening in isolation; we are taking into account a range of other studies.

Some colleagues have raised the work of the MHRA in strengthening the safeguards for young people involved in the trial. The MHRA has been engaged in a scientific dialogue with the trial sponsors, and it was the outcome of that process that led the MHRA, as an independent body, to publish the updated protocol last week. We welcome the changes, because they show that the MHRA is taking its job seriously and that the system is working as intended. We cannot cut corners when it comes to the safety and wellbeing of children, and the safeguards are now in place to guarantee greater monitoring and clinical reassessment, including objective criteria for withdrawing children and young people from the trial entirely. I remind colleagues that the bar to qualify for the trial is extremely high, with only a small number of young people expected to meet the strict criteria.

Some other colleagues—I turn now to the point made by the right hon. Member for South Holland and The Deepings (Sir John Hayes)—have queried the need to have a clinical trial when a number of children have already taken puberty blockers and information is already available. However, Dr Cass concluded that there is not enough evidence about the risks and benefits of those medications. That is why she was so clear in recommending a trial to find that clinical evidence, because that is the basis on which we can take those decisions.

The information in the data linkage study is much more limited than the detailed information that the research team will be able to collect about the relative benefits and risks of puberty-suppressing hormones. NHS England is, however, committed to delivering the data linkage study and has taken time to ensure that the data is shared by relevant organisations.