As I suspected it seems pretty bad over here too.
"More veterans of the Falklands War have killed themselves in the years since the 1982 conflict ended than died during hostilities, according to a veterans support group".
The whole story to be found here
http://news.bbc.co.uk/1/hi/uk/1758301.stm
I've found it difficult to find any concrete figures for British Vets in general, but I wouldn't imagine there would be much difference, I don't doubt that our government is just as rubbish at looking after it's vets as America.