Stephen Dorril on the way the security services began to infiltrate left groups and the trade union movement in the 1960s. He has written extensively on the security services and is the author of Smear!: Wilson and the Secret State.
Eileen Turnbull, researcher for the Shrewsbury 24 campaign, will talk about her work which led to the recent judicial review of the original trials of the pickets in 1973 and 1974.
Laurie Flynn, journalist and co-author with Michael Gillard of Untouchables - Dirty cops, bent justice and racism in Scotland Yard. He will talk about his own experiences of the complicity of the media in ignoring miscarriages of justice and what happens when journalists like him tried to expose police corruption.