I also once worked for Big Airways A and C, and can vouch for their peculiar attitude to engineering and other ground employees. All five of the organizations I've worked for treated, or continue to treat, their engineers pretty badly, but BA had nothing but utter contempt for anything in overalls. Even to the extent that aircrew would refuse to speak to you. Its a bit difficult fixing departure defects when they won't tell you what the problem is, and call Maintenance Control on the radio instead. I've never come across such uppity aircrew anywhere else apart from a single example in the RAF, and I suppose that one became a BOAC Nigel when he left.
**************************
Through difficulties to the cinema