Appreciate any help… Hi, my grandad Felix Vincent Jennings joined the RASC in Redruth Cornwall. DCLI December 1939. He was a Driver (Heavy vehicles). His records state that he was placed in the Y list 1942 (non-effectives) and medically examined and placed in cat. B7 I know the list is 1-8. Does anyone know what cat.B7 means? Kind regards Vince Jennings