The male suicides: how social perfectionism kills 11 years ago
I'd like to offer a different perspective.
Suicide is a violent crime, the killing of a human being.
Now, if we believe Wikipedia, then around 90% of homicides in the US will be committed by males. It seems reasonable that the male-female ratio should be about the same in the UK.
Then a 0.8 ratio of male to female suicides could be accounted for by the increased male homicide rate alone.
The Wikipedia page: http://en.wikipedia.org/wiki/Sex_differences_in_crime