Manslaughter charges against senior rail managers accused of killing four people who died in the Hatfield train disaster were thrown out in July.
The trial – one of the UK’s biggest corporate manslaughter trials – collapsed when Old Bailey judge, Mr Justice Mackay, ordered the jury to find the executives not guilty.
A corporate manslaughter charge against engineering giant Balfour Beatty was also dismissed.
As we went to press, the trial – which started in January – was continuing over health and safety-related charges only, with Balfour Beatty admitting breaching safety standards.
TUC general secretary Brendan Barber said the decision was a blow to the crash victims and the bereaved.
“It is further evidence for a new charge of corporate killing and for new legal duties on directors so that people are held responsible for such preventable incidents in future,” he added.