Do you mean the age of criminal responsibility? It's 10 years of age, though there has been a campaign to raise it to 14, It was 8 before it was 10. The age at which a child is held capable of a crime for which he or she is responsible in law for their actions. Are you asking for views on whether or not it should be raised?
Or are you asking whether the circumstances of a defendant, his mental state or other factors, should prevent him being held responsible for his otherwise criminal actions,and what those circumstances should be? .