Two Just Stop Oil protesters glued themselves to the Royal Courts of Justice - instead of attending their own injunction trial.
18 activists have appeared in the court over an alleged breach of a civil injunction taken out by National Highways in 2022.
Eco-warriors Tez Burns, 35, and Callum Goode, 24, refused to accept the breach.
The High Court injunction was granted to prevent Just Stop Oil protesters disrupting the M25.
Two Just Stop Oil protesters have glued themselves to the Royal Courts of Justice XThe legislation means anyone fixing themselves to any object or structure on the motorway - and anyone assisting - can be held in contempt of court.
Those in breach could face imprisonment, an unlimited fine and seizure of assets.
Yesterday, 11 Just Stop Oil supporters signed a pledge committing them to take no further action.
Six other Just Stop Oil supporters - who were previously named on an injunction taken out against Insulate Britain supporters - were not offered an undertaking.
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Five of these members accepted the breach and will be sentenced today.
A Just Stop Oil spokesperson said: "Injunctions are private laws bought by corporations and government agencies.
"Typically they are used to protect someone from harassment, and are intended as a remedy not a punishment, but since the Insulate Britain campaign began, they’ve been increasingly used by the State and private companies to silence dissent by climate resistors.
"They are being used to circumnavigate the usual rule of law, where defendants appear before a high court judge with no jury.
Eco-warriors Tez Burns, 35, and Callum Goode, 24 refused to accept the injunction breach
Just Stop Oil
"They potentially expose defendants to ‘double jeopardy’ for the same action, where they may also be facing criminal charges.
"Typically injunctions result in astronomical legal costs which are applied to people named on an injunction, even if they have never broken it.
"Where defendants are offered an undertaking - which commits them to a certain action - and they choose to sign it, all costs are then divided equally amongst any remaining defendants.
"This is a divide and rule tactic being used to silence those speaking out about the criminality of politicians and business leaders.”