Allegations of a plot to Islamise secular schools in Birmingham investigated.
British jihadi Babar Ahmad's journey from Tooting to a US jail. Dominic Casciani reports.
Wesley Stephenson goes to south Essex to find out why so many residents voted UKIP.
Are e-cigarettes a health hazard or the best aid we have for smokers trying to quit?
The unsolved murder of Daniel Morgan and claims of police corruption in the case.
Investigating the barrister and author Constance Briscoe, jailed for lying to the police.
Converts to Islam tell reporter Zubeida Malik how they were lured into extremism.
Simon Cox investigates allegations of abuse of power and a culture of silence.
Was David Cameron right to order an investigation into the Islamist organisation?
The MPs' expenses row has claimed another victim, five years after the initial revelations