POST-TRAUMATIC stress is well-recognised nowadays. Therapy is, we understand, made available to military service personnel, although the press regularly publish stories of soldiers who've been discharged and haven't really had all the help they need. This very week a former British soldier murdered his two children and then killed himself. The recent International Chamber of Shipping conference in London highlighted the response by shipping companies to traumatic events involving crew members as an area of crew welfare that should perhaps be commanding more attention…