Arron Banks loses Russia libel case against Carole Cadwalladr

...
Mr Banks, the founder of the pro-Brexit campaign group Leave.EU, sued Ms Cadwalladr for defamation over two instances in 2019 - one in a TED Talk video and another in a tweet.

Mr Banks claimed he was defamed after comments Ms Cadwalladr made about his relationship with the Russian state.
...

In the ruling, Mrs Justice Steyn dismissed Mr Banks' claim, concluding that Ms Cadwalladr held a "reasonable belief" that her comments were in the public interest.
...
Ms Cadwalladr, who first reported the Cambridge Analytica data scandal where harvested data was used during elections, pleaded a public interest defence which allows a defendant to justify themselves based on the reason that the information was in the public interest.

https://www.bbc.co.uk/news/uk-61782578