Maintrol is an important function that should cordinate Engineering and Operations. The working relationship between the two in the airline that I work for is excellant, however there would be a lot to say if a technical decision had to be first approved by a non technical manager, no matter what his seniority within the company.
Fatmantoo, your profile states that you are an engineer, is that a licenced aircraft engineer or is it something that you like to think youself as. It seems these days in and outside of the industry, that if you can tell the differance between a screwdriver and a wrench you are automatically an engineer, with or without the necessary qualifications.
What do the senior engineering managers within BA have to say about this, and the pilot management, and more to the point, the CAA.
An IFSD to my way of thinking and to anyone with a grain of common sense would require an immediate diversion to the nearest convenient airport. Passenger safety and welfare is paramount and trip disruption is a small price to pay in comparission.