........... unless you're a BA employee, you're unlikely to know any of the others!
It wasn't any of the people you mention and it's quite easy to recognise senior BA management board and operations board managers. Just go to the corporate website and pictures/biogs of execs and non execs are there for all to see as well as .pdf's of annual reports which also contain pictures.
For the record, I am not suggesting that the person in question bypassed border controls.