Sean Ingle's poised the question.
My initial thoughts are 1) I like the libel laws of the US better. I don't consider what Ben said to be libelous. Farah may not like the questions poised but where does Ben cross the line? But even in the US someone could file a lawsuit alleging libel and you'd have to pay to get it dismissed so the difference in laws may not make much difference.
2) I think Freuds is giving Farah bad advice. They are the one's who got trashed by Ben Bloom. If they encouraged him to sue, (partly because they are pissed), I think it brings more negative publicity. Plus journalists tend to stand up for one another so it's not going to win Mo any favors in Britain.