Chelsea owner Roman Abramovich: His libel suit disputes a claim that Vladimir Putin ordered his 2003 acquisition of the football club as well as other allegations. Photograph:  Nick Potts/PA

Four Russian billionaires and the country’s state-owned energy giant have filed lawsuits against HarperCollins over a book it published last year abou(...)

The British establishment failed to grasp the nature of Russia’s transformation under Vladimir Putin. Photograph: Sergei Ilnitsky

Negligence. Greed. Fear of damaging relationships. Over-stretched spy agencies. A simple lack of curiosity. These were among the reasons that success(...)