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Why do so many British public sector contracts go to foreign companies?
As the Treasury reviews tax avoidance, Fran Abrams asks - how widespread is the problem?
What drives fathers to kill their families and themselves? Jane Deith investigates.
Do credit rating agencies threaten our financial stability? Hugh Pym investigates.
Despite pledges to tackle diabetes, why do 24,000 people die needlessly each year?
How will a European ban on Iranian oil affect Britain during a period of economic gloom?
As scientists alter viruses to make potentially deadly mutations, is the public at risk?
Angus Stickler investigates deaths in police custody.
File on 4 investigates claims of bullying and abuse of power by social services.
Ann Alexander investigates whether families are getting justice in the coroner's court.
Will Britain's Olympic billions buy a lasting legacy for taxpayers?
Should more prisoners be made to work? And are government plans to make them realistic?
How investors are profiting from the eurozone crisis. Can money be made from disaster?
Are children at risk of abuse in Britain's unregulated madrassa schools?
Allan Urry investigates the Government's radical changes to the planning system.
Are households and businesses being overcharged for gas and electricity?
Does the NHS spend too much on bandages and syringes? Jenny Cuffe investigates.
Cyber Spies: computer hacking and the state.
Can the government's strategy to boost local enterprise recover from a 'chaotic' start?
Why are some Rwandans in the UK living in fear of their government? Jenny Cuffe reports.
Is there a conflict of interest when public servants take private sector jobs?
Allan Urry examines claims of a crisis in hospital accident and emergency services.
Facing massive job cuts, will the Border Agency be able to protect the UK's frontiers?
Do the complex financial products banks still offer threaten another meltdown?
Why the UK's elderly care sector is facing a financial crisis.
Should it be made simpler to end the life of patients in a vegetative state?
Have taxpayers lost billions of pounds in the secretive resale of PFI contracts?
Allan Urry investigates claims that Iran has been stepping up its support for terrorism.
When a plane crashes, does the investigation always get to the real reasons?
Can memory evidence alone deliver justice in sex abuse cases when claims go back decades?