In November 1939 my grandfather's first posting was to 56th TR in Catterick. I'd be grateful if anyone could throw any more light on this. What does the "TR" in 56th TR refer to? Many thanks.
Catterick was home to many Training Centres 123 OCTU RA. Army School of Signals was another. Here is a starter for 56 TR: BBC - WW2 People's War - Enlistment - 1942
