It was Christmas 2011, a year after Roman Abramovich had taken delivery of his new superyacht, Eclipse. But it seemed the oligarch would not be using it over the festive period - records show it had been chartered by a company based in the British Virgin Islands. And yet photographs from Christmas Day that year show Mr Abramovich in the Caribbean sunshine, standing on the swim platform at the rear of the yacht, with Eclipse's large letter-E logo behind him. Charter records such as this were part of a decade-long scheme to mislead tax authorities, now uncovered in an investigation...