Appleby, a major law firm based in Bermuda, has said the financial details of super-rich clients may be leaked after it suffered a major data breach last year. The offshore firm said it suffered a "data security incident" in 2016 that "involved some of our data being compromised".

The firm is currently warning clients, including some of the wealthiest people in the UK, that their sensitive information may be leaked after it was approached by the media group behind the reporting of the Panama Papers. In 2015, the International Consortium of Investigative Journalists released the so-called Panama Papers, a cache of 11.5 million leaked financial documents from Panama City-based Mossack Fonseca.