Baroness Cass (CB)

My Lords, as Sarah-Jayne Blakemore has been widely referred to, it might be useful to directly quote her. She said: “Most of these age cutoffs have not been based on what we know about brain development, because they were decided way before we knew anything about how the brain develops during adolescence. So what I would say is that those kinds of decisions about age cutoffs”— she is referring to the various age cut-offs for drinking, marriage and so on— “should incorporate the new knowledge about brain development during adolescence. On the other hand, this is a question I’m asked often, I don’t think the neuroscience can provide an age for you. We can’t say, ‘Oh, the neuroscience shows that the brain becomes adult at age 18 or 24’ or whatever it might be. It’s much more complex than that”. She goes on to describe how different brain regions develop and mature at different rates, and to talk about the individual differences in the speed of brain development: “So what I would say is that what we know from neuroscience is the kind of age range, the very broad age range when the brain becomes mature and adult. And that’s much later than 18, between 20s and 30s for most people. So of course that cannot generate an age at which you become legally adult”. That is what Sarah-Jayne Blakemore has said. On that basis, I support the suggestion from the noble Baroness, Lady Finlay, that, between the ages of 18 and 25, there should be enhanced and careful assessment, taking account of that perspective.