It is not unusual for an SFO investigation to take some time before reaching its conclusion.  In fact the length of the SFO's investigation into Soma is relatively short when compared to others on the SFO's books.

This case raises the serious issue that faces many companies subject to a criminal investigation.  The serious reputational damage that can stem from a criminal investigation can be catastrophic.  Many customers and investors will be tempted to take their business elsewhere leaving the company at risk of collapse.  

Some companies may be equipped to weather the storm of a lengthy investigation for a while.  In this instance the Judicial Review brought on behalf of Soma against the SFO failed.  But given the serious damage caused by criminal investigations it is unlikely that this is the last crime we see the authorities subject to judicial review, especially when the company strongly believes it has done nothing wrong.