Children who are physically punished at ages 3, 5, and 7 grow up to face measurably worse outcomes—lower exam scores, higher rates of bullying, a trajectory shaped by the very hands meant to protect them. That stark finding, buried in a new UCL report, has reignited calls for England and Northern Ireland to join Scotland, Wales, and 70 countries worldwide in banning physical punishment entirely.
The research matters because it's the first rigorous UK-focused study of its kind, using real data from nearly 19,000 children born between 2000 and 2002 to show what happens when smacking becomes routine discipline. The numbers are sobering. Children who experienced physical punishment at all three ages—3, 5, and 7—were 5.7 percentage points more likely to fail their GCSEs, meaning they didn't achieve five grades A* to C (or 9 to 4) in core subjects including English and maths. While 42.3% of unpunished children missed that benchmark, 48% of those who were physically punished did. The gap widens further in behavior: by age 14, these children were 40% more likely to engage in risky behaviors like bullying or physical aggression. At 17, they remained 26% more likely to show such antisocial behaviors.
What makes this research particularly urgent is the legal inconsistency it exposes. In Scotland and Wales, smacking is already illegal. In England and Northern Ireland, it remains permitted under the "reasonable punishment" defense—a legal shield that no longer exists for striking adults. The contradiction was not lost on lead researcher Dr. Anja Heilmann at UCL's Epidemiology & Public Health division, who called recent decisions to drop ban proposals in both regions "a huge missed opportunity and deeply disappointing." She framed the issue simply: "Children have the right to be brought up free from all forms of violence. It cannot be right that, in 2026, children in England and Northern Ireland have less legal protection from physical harm than adults."
The research also provides perspective on how cultural change happens. As recently as 2021, one in five 10-year-olds in the UK had been physically punished in some way, showing that despite a long-term decline in parental use of physical punishment, it remains disturbingly common. Yet the experience in Scotland and Wales offers a template. Dr. Becca Lacey, reader in social and lifecourse epidemiology at City St George's, University of London, noted that "once achieved, societal acceptance of law reform is high." Those countries proved that banning the practice doesn't require a cultural revolution first—it can spark one.
The researchers' conclusion is unambiguous: physical punishment has no benefits. Across their quantitative analysis of longitudinal data and qualitative exploration of how Scotland and Wales implemented their bans, the evidence pointed in one direction. This is not about whether smacking works as discipline—it demonstrably doesn't. It's about whether children deserve protection from violence at home, and whether lawmakers in England and Northern Ireland are willing to provide it. The data says they should. The question is whether political will follows.