Moggie,
Either you have missunderstood me (or me you) or you must be pulling our collective legs here

.
I don't believe BA would have a 744 on 3 engines with the engine fire light out put down on a gravel strip in Canada when it could continue to something a little more user friendly!
Having the light on is, of course, a different situation

Glad everyone was ok.
On a different note, if this was diplomatic baggage that caught fire, what are the security and safety implications of this stuff not being checked like 'normal' baggage in the current climate?
Just what checks are done?
Happy landings