File on 4 Investigates

The midnight collapse of the Government's plans for the West Coast main railway line once again raises questions about the outsourcing of public services to private providers.

The ultra-conservative Salafist movement, which is said to be the fastest growing branch of Islam, has been blamed for being behind many of the recent violent protests over an anti-Muslim film which appeared on the internet. Jenny Cuffe investigates the spread of Salafism across the countries of the Arab Spring. She asks what threat it poses to democracy in the whole region and also examines concerns in Europe that Salafists now represent a significant security risk.

A criminal gang was recently jailed for one of the biggest ever alcohol smuggling rackets in the UK. It's become big business for organised crime according to HMRC, with tax losses in unpaid duty as high as £1.2 billion per year. MP's are demanding tougher action. But these are highly complex frauds, which take years to investigate. Allan Urry examines the scale of the challenge facing the authorities, and reveals the extent to which criminals have penetrated the legitimate market in beer, wine and spirits

How far should undercover police officers go to gather intelligence?

Jane Deith talks exclusively to women suing the Metropolitan police claiming they were tricked into long standing relationships with undercover officers.

The unmasking of undercover cop Mark Kennedy who'd been infiltrating environmental protest groups has led to revelations that other officers had relationships with woman they were spying on. The women argue that the state agents they fell in love with used them physically and emotionally. They say the officers intruded into the most personal aspects of their lives causing them lasting damage. Their lawyer claims the relationships were a breach of the women's right to privacy and their right to form relationships without the interference of the state.

Yet there are no hard guidelines on undercover officers sleeping with 'targets'. The rules of engagement are shrouded in secrecy. Police chiefs have said the officers broke the rules, yet former undercover policemen say sex was sanctioned as a means of gathering intelligence. And the Government has told Parliament affairs like this can be a necessary part of undercover work.

So is forming intimate relationships a legitimate part of a difficult and vital area of policing, or an abuse of power by the state?

And, from environmental protest to serious and organised crime, how much do we really know about the secret methods of undercover policing?

Presenter: Jane Deith

In the first of a new series, Gerry Northam investigates the rising number of so called "green on blue" attacks in which Afghan soldiers and policemen have turned their guns on British and other international troops.

With more than 50 NATO troops killed in insider attacks this year, is enough being done to protect those working as mentors?

The US has invested over $50 billion on developing independent Afghan security forces but according to a US Government audit, the majority of Afghan troops remain heavily reliant on American help and support. Even widespread illiteracy remains a problem.

Meanwhile the impact of the recent attacks is huge - undermining the trust that's needed between the Afghan forces and the coalition troops getting them ready to take over the security in 2014.

So how reliable is the screening of new Afghan recruits? And, with continuing questions over their loyalties and capabilities, can there be an effective withdrawal in two years' time?

Presenter: Gerry Northam

World health chiefs have branded diesel exhaust emissions a major cause of cancer. Despite the efforts of car-makers to filter out the most noxious substances, these fumes still play a big part in causing air pollution.

Figures released this month reveal almost 9000 new tuberculosis cases in the United Kingdom last year, the highest level since the 1970s. The disease has risen by more than a third in the past decade. In parts of London, Birmingham and other cities it is already at the level of high-risk countries in the developing world.

Yet in most of the rest of Europe TB rates have been steadily falling in recent years. Health experts have found that cases of TB remain static among people of all ethnicities who were born in Britain. They attribute the national rise in cases to migration from some former British colonies in sub-Saharan Africa and the Indian sub-continent.

Airport screening of migrants, using a chest x-ray, identifies only active cases of the disease in the lungs. It misses the much more numerous cases of latent TB which can progress to become active at any time. An estimated 10,000 cases of latent TB arrive undetected in the UK each year.

A nationwide survey of NHS blood-test screening programmes shows that the areas with populations most at risk are also those with least effort put into screening for latent disease. Patients' groups also question the level of GPs' awareness of the many manifestations of tuberculosis, citing cases of repeated missed diagnosis or misdiagnosis which have left patients suffering as the disease advances with sometimes fatal consequences.

Gerry Northam investigates the resurgence of a condition once thought to be all-but eliminated from the UK and asks if the NHS is failing to tackle it.

Producer: Gail Champion

Thousands of British troops have been deployed to conflict zones since 2001, in the so-called War on Terror. Research is now beginning to confirm what many people have suspected - that a sizeable minority of returning soldiers - one in ten - are displaying increased levels of violence. This is impacting on families through domestic abuse and is raising the risk of people in the wider community becoming victims. With two years to go before frontline troops are pulled out of Afghanistan, is the Army doing enough to make sure returning soldiers are safe? And is the intensity of deployment to active combat zones making matters worse?

The EU has allocated millions of pounds in grants to help our towns and cities regenerate. So why are some complaining they can't get their hands on the cash? European rules mean Britain has to put up an equal amount of money. But, as Allan Urry reveals, cuts at Westminster and in town halls around the country mean that some projects have either stalled or been abandoned because no "matched funding" is available. Critics of the Government say up to a billion pounds of regeneration money will end up in the Treasury's coffers or being returned to Brussels. Yet, it supposed to be supporting economic development in the English regions which the Government has argued will drive growth. That's what's happened in Germany and other EU countries. Have they made better use of funds from Brussels to help narrow the gap between their rich and poor regions? Now, as Europe struggles with austerity, does the European Commission need to re-think its system for allocating cash, and should the Coalition Government in Britain do more to deliver growth?

Producer: Samantha Fenwick.

It was the Paul Hickson scandal in the mid 90s which first brought the issue of sexual abuse in sport to the public eye. The Olympic swimming coach was jailed for 17 years for raping and sexually abusing young girls he trained. The case led to the setting up of the Child Protection in Sport Unit and the introduction of safeguarding measures in most sports.

But, more than a decade on, the problem hasn't gone away and this edition of File on 4 reveals new figures which show how many allegations of sexual and physical abuse were made across most major sports last year.

The programme also examines concerns about the way information about coaches who have disciplined or banned, is shared with parents and other sports bodies, primarily because of data protection laws. It reveals how some coaches accused of sexual misconduct are able to move between sporting organisations and carry on coaching

Presenter: Chris Buckler