Hi Steve According to a RE Order Of Battle I found online many year ago. 603rd Field Coy RE Served with 21st Army Group 1944-45. Number later used (ca.. 1946) by 603rd RW Cons Coy RE; either re-designation or new unit. Hope this helps Gus
Number indicates Argyll & Sutherland Highlanders and there is a casualty list entry for him with this regiment reported missing 27/5/40.