Theresa May faces questions over her role in the parts which were redacted from the American Senate's damning report on torture techniques used by the CIA after 9/11.
MPs on the influential Home Affairs Select Committee want to know whether she asked for sections to be redacted because they could embarrass Westminster.
The devastating report into CIA interrogation techniques had some passages redacted at the request of British intelligence.
Tonight a member of Parliament's Intelligence and Security Committee told ITV News they want answers from the UK's security services.
ITV News Political Correspondent Carl Dinnen reports.
A former US Vice President has condemned a shocking report into interrogation techniques used by the CIA, slamming it as "full of crap".
While it seems beyond the realms of possibility now, things can change, what is unlikely now is conceivable in 30 years time.
Shocking details about the CIA's "brutal" interrogation techniques have been laid bare. (Note: graphic descriptions may cause upset)