No further details, in terms of casting, theatre or dates are available yet, but producer Matthew Byam Shaw has called the work "a fascinating sword-fight of a play," and according to a report in London's Daily Mail, it is about two women -- the governor of a prison and a lifer trying to convince her that, after years behind bars, she's ready for parole. The prisoner has been involved in a violent political organization, "loosely based on a Baader-Meinhof or Weather Underground-type anarchist group," according to Byam Shaw, though it is not based on any particular individual.
Mamet was most recently represented on Broadway by a revival of his play A Life in the Theatre, and before that the premiere of Race. Other plays include American Buffalo, Speed-the-Plow, November, Sexual Perversity in Chicago, Edmond, Romance and The Old Neighborhood. He is co-founder of New York's Atlantic Theater Company, of which he remains a member.