Why is Network Rail struggling with its billion pound plans to upgrade our railways?
Are taxpayers getting value from Britain's £12 billion foreign aid budget?
Destination UK: Uncovering the back door route for migrants trying to get into the UK.
Does a leading stroke drug cause more harm than good?
How can we build more houses and still protect our countryside? Allan Urry investigates.
Abandoned to their fate - are teenagers being pushed out of the care system too quickly?
Are vulnerable patients dying after being discharged from mental health care too soon?
Why, ten years on, does one of the biggest murder cases in Scotland remain unsolved?
How sexual abusers are increasingly targeting people with learning difficulties.
After terrorist shootings in Europe, how vulnerable is the UK to a similar attack?
Why are so many teachers off work with stress? Jane Deith investigates.
Have UK taxpayers been paying over the odds to prop up council pension funds?
Fran Abrams reports on the shortage of secure places for children at risk.
Have local authority insurers too much influence on the way sex abuse cases are handled?
Is Islamic State profiting from the global trade in antiquities looted from Syria?
With rising numbers of asylum seekers, are some UK communities struggling to cope?
With so much pressure on the NHS, why are we still so short of nurses? Jane Deith reports.
Benefit sanctions are aimed at shirkers, but is the system also penalising the vulnerable?
With serious assaults at a record high, is there a crisis unfolding in the prison system?
Care Crisis: Can the NHS afford long-term community nursing care for the old and the sick?
What is being done to tackle the UK's £1 billion black market in illegal waste dumping?
Did private equity takeovers play a role in the collapse of some major high street names?
Is there a hidden problem of child sex abuse within Britain's Asian communities?
Simon Cox investigates why it took so long for the world to wake up to the threat of ebola
What lies behind plans to outsource NHS cancer care in parts of the Midlands?
Do official crime figures reflect the rise in fraud, and are police able to combat it?
With concern over illegal immigrants and returning extremists, how secure are UK borders?
Is a scandal bigger than Libor brewing for the banks? Did they rig other key markets?
Victims of sexual abuse at Knowl View school in Rochdale tell their side of the story.
Childhood Cancer: Is red tape stopping the development of new drug treatments?