Despite Tony Blair pushing through changes to allow corporate bodies to use defamation laws, it's still pretty rare and an uphill struggle. The McLibel case showed how dangerous it is for a company to resort to that sort of litigation.

They spent millions, had an array of hilarious 'mom & apple pie' witnesses flown in from the US and managed to lose on many points (but not all) and were left with a useless judgment which they can never collect on as they were stupid enough to sue two people with no assets or any prospect of having any.

They did however, become a laughing stock in the legal world and have an array of TV programs and plays, mocking them mercilessly. Plus some of the, till then, unproven, claims of disgusting practice ended up being proven and therefore repeatable without risk - which was not the case beforehand.

Defamation actions are never a good way to go. Even winning one does not generally help you much.