Twenty-nine people convicted after protests at a power station, where a police officer was working undercover, have been invited to appeal against their convictions.
The Director of Public Prosecutions, Kier Starmer, said that there were concerns about the safety of the prosecutions in 2008 because lawyers may have failed to disclose information about the activities of undercover cop Mark Kennedy, from Nottinghamshire Police.
Kennedy spent seven years posing as a long-haired drop-out climber, Mark "Flash" Stone.
His actions have been blamed for the collapse last year of a case against six protesters accused of planning to invade the coal-fired Ratcliffe-on-Soar power station in Nottinghamshire.
The Met Police said: "The MPS has been carrying out an examination of records relating to the deployment of Mark Kennedy as an undercover officer [...] We are satisfied that in all cases examined to date...police disclosure obligations to CPS prosecutors were met."
A report into the collapsed prosecution of six protesters accused of trying to shut down a power station has criticised Nottinghamshire police of 'collective failings'.
The Independent Police Complaints Commission (IPCC) said the sharing and recording of information about an undercover police officer hadn't been well handled.
The IPCC also concluded that the actions of individual officers did NOT amount to police misconduct.