It is a libel if you claim that that PWC will find in favour of BA because they are in some way biased or an impartial manner. It is not a libel if you say they will find in favour of BA because BASSA has in fact no case and BA is correct in its arguments.
As for Willie Walsh leaving I think if you look back to the AGM just a few days ago he was pretty well endorsed by the shareholders.
However, it does seem that merely saying something does make it fact in BASSA world - truth is an alien concept there.