BBC Radio 4 - File on 4 Investigates

Dementia: What Do We Know?

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

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

Could York learn from its Dutch counterpart about flood protection?

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

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

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

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

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

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

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