Ignition Overide
There is a huge difference in operating philosophy here. UK airlines do not have a dispatcher/flight following system as US airlines do. Therefore all decisions when airborne are the resposibility of the flight crew. When a divertion is nescessary, if fuel/time is short, then an alternate can be used without reference to the company. If more time is available then BA ops would be contacted either locally or in LHR for a discussion about the most suitable course of action.
In the case of MEM/LIT I would choose Elvis over Bill every time....