Originally Posted by
Orange.Man
You realise the crew are only going on information they're given?
I am quite certain that ATC will have made it clear that they were refusing British Airways aircraft from LHR rather than saying the whole airfield was shut.
I too was diverted to NCL yesterday and the captain on our flight stated that detail very carefully each time, even correcting himself once to clarify that it was indeed only British Airways that was subject to this limitation.