Police are urging Extinction Rebellion activists not to target the London Underground as part of its protests demanding action on climate change.
British Transport Police said they had engaged with XR members to prevent the planned 'disruptive and potentially criminal' action on the transport network.
It comes as XR's bid to defy the blanket protest ban on its protests across the whole of London will come before the High Court on Thursday.
Those bringing the court action on behalf of the group, including Caroline Lucas MP and Guardian columnist and activist George Monbiot, are seeking to overturn the order imposed by the Met.
Lawyers representing the climate protesters will argue in a preliminary session that a full hearing of the case should happen 'as a matter of urgency'.
They will argue that the section 14 order imposed by the Met effectively banning all XR protests in London is unlawful.
Meanwhile BTP will increase the number of visible patrols across London Underground, the DLR and other rail networks throughout the day to keep the trains moving.
Assistant Chief Constable Sean O'Callaghan said BTP is working with partners to keep disruptions to a minimum.
He said: "We are really disappointed that they have since announced fresh action on the London Underground network.
"The Tube and rail networks are one of the greenest transport methods in London, any action goes against what they campaign for and will only cause misery for London's commuters."
