The Serious Fraud Office (SFO) is expected to announce on Thursday whether it wishes to prosecute BAE Systems over alleged bribery.
The case refers to allegations that the UK defence giant paid out millions of pounds in order to win contracts from a number of countries.
BAE has always strenuously denied any suggestion of wrongdoing.
A separate investigation into BAE by the SFO was dropped in 2007 after it said national security was at risk.
In that case the SFO ended its investigation into a giant 1980s arms deal BAE secured from Saudi Arabia. read more
