Is the age of the accused relevant to the standard of self-control of the ordinary person?

87. In my opinion the age of the accused is relevant in a case such as this to the standard of self‑control of the ordinary person rather than to the gravity of the provocation. With respect, this appears to me to have been the view of Lord Diplock in Director of Public Prosecutions v. Camplin, [1978] A.C. 705. I think this appears clearly from Lord Diplock's use of the words "power of self‑control" and "standard of self‑control" in association with the age of the accused on pp. 717‑18, and particularly from what he said on p. 718 should be the judge's direction to the jury: "He should then explain to them that the reasonable man referred to in the question is a person having the power of self‑control to be expected of an ordinary person of the sex and age of the accused, but in other respects sharing such of the accused's characteristics as they think would affect the gravity of the provocation to him...". I am content, with great respect, to accept the rationale or justification suggested by Lord Diplock for regarding the youth of an accused as relevant to the standard of self‑control of the ordinary person.