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Destination UK: Uncovering the back door route for migrants trying to get into the UK.

• 38 mins

The Aid Business

Are taxpayers getting value from Britain's 拢12 billion foreign aid budget?

• 38 mins

Off Track: Network Rail

Why is Network Rail struggling with its multibillion-pound plan to upgrade our railways?

• 38 mins

Police Complaints: A Fair Cop?

Good cop? Bad cop? Reforming the police complaints process. Presented by Claire Savage.

• 38 mins

The Cost of a Cuppa

Jane Deith investigates conditions for tea workers in Assam.

• 38 mins

CPS: Prosecutors on Trial

Under fire over controversial decisions, is the Crown Prosecution Service up to the job?

• 38 mins

Working in the Shadows

Simon Cox meets migrants working in Britain illegally.

• 38 mins

Missing Medicines

Allan Urry investigates why the NHS is running short of some life-saving medicines.

• 38 mins

Dirty Money UK

The role of British companies in a billion-dollar Moldovan bank scam.

• 38 mins

Colleges in Crisis

With millions of new apprenticeships promised, how will cash-strapped FE colleges deliver?

• 38 mins

Can Rotherham Recover?

A lasting legacy? Have the sexual abuse revelations blighted Rotherham in the longer-term?

• 38 mins

The Billion-Dollar Aid Question

The UK is giving a billion pounds of aid to Syrian refugees. But is it being well spent?

• 38 mins

Locum Doctors: Bad for Your Health?

How safe are we in the hands of the growing number of agency staff at NHS hospitals?

• 38 mins

An Inside Job

British people smugglers: inside the trade in bringing illegal immigrants into the UK.

• 38 mins

Bent Cops?

Allan Urry investigates claims of dirty tricks in one of Britain's biggest police forces.

• 38 mins

Tennis: Game, Set and Fix?

Have the tennis authorities done enough to investigate allegations of match-fixing?

• 38 mins

NHS Contracts: Tender Issues

File on 4 investigates the collapse of one of the NHS's biggest healthcare contracts.

• 38 mins

Vaccine Damages

Are people damaged by vaccines being short-changed by the government?

• 38 mins

After the Floods - A Tale of Two Cities

Could York learn from its Dutch counterpart about flood protection?

• 38 mins

Sunni Shia Splits?

Are relations between Sunni and Shia Muslims in the UK being strained by tensions abroad?

• 38 mins

Dementia: What Do We Know?

Has a drive to increase the diagnosis of dementia and find a cure been effective?

• 38 mins

Special Guardianships: Keeping Things in the Family?

Placing children with relatives is an alternative to adoption. But does it always work?

• 38 mins

UK Asylum: A Systems Failure?

With applications rising, is the UK's asylum process reaching crisis point?

• 38 mins

Tennis: The Italian Files

Simon Cox reveals more allegations about match-fixing in tennis.

• 38 mins

The Panama Papers

A major investigation reveals how the world's most notorious regimes get around sanctions

• 37 mins

Dirty Oil?

Did UK firms win multi-million pound oil contracts through bribes to corrupt officials?

• 38 mins

Police Firepower

Do the plans to recruit more armed police go far enough? Danny Shaw investigates.

• 38 mins

An Unsafe Conviction?

Thomas Bourke has served more than 20 years for murder, but is his conviction safe?

• 38 mins

Fair Game

Should English football clubs take a closer look at who they turn to for investment?

• 38 mins

The Cancer Drugs Fund

How will the new Cancer Drugs Fund cope with the challenges of rising cost and demand?

• 38 mins