Two of the Drax protesters whose convictions were quashed today, Beth Stratford and Robbie Gillet, said they hoped a public inquiry would be launched into the practices of undercover police officers.
Twenty-nine protesters were convicted in 2009 and 2010 after ambushing a freight train as it took fuel to the Drax power station in Yorkshire.
But their convictions were quashed after it was revealed that an undercover police officer had been part of the protest, and that his presence had not been disclosed by police during the court case.
More top news
An inventor who built a submarine has told police that a missing journalist died onboard in an accident, and that he buried her at sea.
Want to see the moon appear to take a "bite" out of the sun? Here's some tips on how to do it without damaging your eyes.
Rugby star Matt Dawson has revealed how he required heart surgery after developing Lyme disease from a tick bite.