How did the man from the Revenue get millions of Britons' tax codes so wrong?
James Silver looks into the theories surrounding the release of Abdelbaset Ali al-Megrahi.
Straight A's and on the verge of signing-on: the plight of the well-educated unemployed.
Mukul Devichand investigates who can be extradited to face trials abroad.
Nadene Ghouri investigates how meat from the offspring of a cloned cow was eaten in the UK
Simon Cox investigates the death of Ian Tomlinson at the 2009 G20 protests.
Mukul Devichand investigates how people on benefits will be reclassified as 'fit to work'.
Should the government cut back on its use of methadone to treat drug addiction?
What do the NHS reforms mean for health care in England?
The government wants more criminals on community sentences - but are they a soft option?