Hello, I came across the abbreviation in the Nominal Roll of Officers On Strenght of the 2nd Bn. N. STAFFS for March 1940. It regards a liaison officer not present with the unit for the duration of three weeks. The reason not being present with his unit is: C of Inst. Sc of S. Catt. also written as C of Inst. School of Sigs. Catt. Has anyone got an idea what the abbreviation stands for? Could it stand for: Course of Instruction School of Signals Catterick? I thank you for any help you can give me. Dirk