The Ministry of Defence operated "flagrantly" outside the laws on detention, a spokesman from lawyers Leigh Day said.
The law firm, who represent Afghan farmer Serdar Mohammed in his damages claim for assault, false imprisonment and human rights breaches against the Government, made the comment after the High Court ruled UK forces' detention policy in Afghanistan was unlawful.
When we send our troops abroad it is the Ministry of Defence's job to ensure that the mechanisms are put in place to ensure that they operate within the rule of law.
As the court has made clear, the MoD fully understood the parameters of the law regarding detention and yet they decided to operate flagrantly outside those rules.
More top news
The actor and musician, who played character Matt Musgrove on the soaps between 1998 and 2004, has died.
The family of a teenage boy who died after a hit-and-run in Leicester are urging the public to help find the driver of the car.
Footage of a gun battle between Peruvian authorities and suspected drugs traffickers in which a plane was shot down has been released.