During the WW2 many employees were exempt from National Service so the company could provide manufacturing services to the MOD. A special “Ray” badge was issued to spare the stigma of not signing up!
The MOD already had a plastics supplier called Ray, so they were unable to use this name. They decided instead to adopt an abbreviation of the whole company name. As required, the company rebranded their products “RENCOL” and we have traded as such ever since.