Swiss prosecutors are seeking a four-year jail sentence for Trafigura’s former operations chief, Mike Wainwright, as part of a bribery case relating to shipping deals in Angola.

The Financial Times reported that prosecutors are also seeking $156m in compensation and penalties from the charterer and shipowner over what they alleged was a “textbook” conspiracy.

The trial began at Switzerland’s federal criminal court last week, relating to allegations of corruption between 2009 and 2011.