It is always sad when a fellow pilot dies.
On the other issue, where I live (Europe) it is an offence not to give appropriate first aid if one is trained to do so. That is civil law and applies to everyone. If it turns out to be the case that the BA ambulance was nearby, was alerted and refused to attend that certainly would put BA in an awkward position!
I feel sure that a trained paramedic wouldn't refuse regardless of what his job description was!