The UK's Military Flying Training System trains pilots on aircraft from fighter planes to navy helicopters. It takes years for trainees to get their wings. But delays in the system, mean many pilots and crew are 'on hold', waiting months, often years to take to the skies.

File on 4 investigates the reasons for the hold ups. What's the impact of these delays on the public purse and on our military capability?

The government's promising a beefed up armed forces, including two new Typhoon squadrons and F35 jets. Defence Secretary Gavin Williamson says the UK needs to be ready to use 'hard power' or risk being seen as little more than a paper tiger. But with the MoD's flying training still not at full throttle, will a lack of pilots undermine our military capability?

Reporter: Jane Deith

Photo Credit: Christopher Furlong\Getty

If you’ve been the victim of sexual or violent crimes then you can apply for compensation from the Criminal Injuries Compensation Authority (CICA).

During 2017-2018, the government funded scheme paid out over £154 million to help people rebuild their lives.

But for some victims it’s not straightforward.

Solicitors and charities argue that inflexible rules exclude too many people from successfully making a claim, including those who apply more than two years after a crime happens, and those who have an unspent conviction of any kind.

Even where people are eligible for compensation, are they always getting what they deserve?

Applications to the CICA can be made without the help of a solicitor but File on 4 investigates whether victims without legal advice may be being deprived of their entitlement.

Serious questions are also being asked about the effect on vulnerable applicants when the CICA puts an award into a legal trust and dictates exactly how the money will be spent.

A government review into the scheme is currently underway and is set to report back later this year but in the meantime, is it fair to those whose lives have been affected by abuse or violence – or is it penny-pinching to save public money?

Presenter: Lesley Curwen

Photo credit: Education Images\Getty

Police across the globe have successfully infiltrated leading dark web criminal markets. The result is that the trade in illegal drugs, stolen credit cards and indecent images of children is shifting to encrypted mobile phone apps. The crooks believe their business is protected by 'uncrackable' technology. So what should Government and the telecoms companies do to ensure criminals do not exploit secure encryption?

Reporter: Geoff White

(Photo credit: NurPhoto\Getty Images)

Transforming Care is the NHS policy which should be moving learning disabled people out of hospital units and into their own supported homes.

But File on 4 asks if the growth in the supported living sector is really providing the happy, safe and secure homes it was meant to.

While the NHS has struggled to get its money into the hands of the councils who provide supported living, councils have gone their own way; commissioning services from care companies and homes from private landlords to give learning disabled adults their own front doors and their own independence.

But with little in the way of inspection and councils under budgetary constraints, File on 4 asks if the push to build supported living risks repeating the mistakes of the past, with some of the country's most vulnerable people housed in institutions far from public scrutiny.

Reporter: Claire Bolderson

(Photo Credit: MediaNews Group/Orange County Register via Getty Images)

Last month, law enforcement officials in Spain said they had broken up a major match fixing ring in tennis. The Guardia Civil said 28 players competing at the lower levels of tennis were implicated. It's alleged that a group of Armenians had bribed the players to fix matches.

File on 4 reveals the inside story of how players and betting gangs are seeking to corrupt the lower tiers of the sport. In many cases, a player only has to lose a set or certain games - not the whole match - to get paid. Players and fixers communicate on social media as matches get underway to ensure the correct outcome is achieved. The rewards can be significant with players sometimes being paid thousands of pounds - often much more than they can earn in prize money. For the betting gangs who have placed money on a guaranteed outcome, the pay off can be much greater.

Two years after File on 4 first revealed concerns about match fixing in the game, the programme looks at how the tennis authorities have responded to the issue and examines the measures put forward by an independent panel to reduce the risk of corruption.

Reporter: Paul Connolly

Photo credit: AFP / Getty Images

Tom Wright investigates the normalisation of drug taking amongst Britain’s students. A recent graduate, he says Class A drugs like MDMA are bought and sold with impunity by students across the country. The student bubble, like a music festival, has become an almost decriminalised space - where the chances of getting caught are perceived to be almost non-existent. Drug dealers brazenly target student areas, handing out business cards with a la carte menus of Class A and B drugs.

Unlike music festivals, where on-site drug testing is rapidly becoming the norm, universities do little to engage with harm reduction. Those that do risk widespread criticism for ‘normalising’ drug taking. Meanwhile Universities proclaim "zero tolerance" drugs policies and the police say they have neither the resources or the inclination to punish casual drug use.

Tom Wright investigates whether universities are doing enough to help their students and asks, could campus drug testing help keep our students safe?

If you’ve been affected by addiction, help and support is available:

Presenter: Tom Wright

Modern slavery and human trafficking in the UK are more prevalent than ever before.

Police estimate tens of thousands of victims are hidden in towns and cities across the country; many kidnapped then subjected to forced labour or sexual exploitation, often under the threat of violence.

But what happens to victims after they escape or have been rescued?

File on 4 investigates the government system designed to identify and support victims of modern slavery and human trafficking.

File on 4 investigates allegations that a failure to adequately protect victims means some face being drawn back into exploitation by the very gangs from whom they escaped in the first place.

With the Prime Minister describing modern slavery as "the great human-rights issue of our time" is enough being done to tackle the root causes and protect those unable to protect themselves?

Reporter: Paul Kenyon

Uganda is a country that has seen massive growth in the number of 'orphanages' providing homes to children, despite the numbers of orphans there decreasing. It's believed 80% of children now living in orphanages have at least one living parent.

The majority of the hundreds of orphanages operating in Uganda are illegal, unregistered and now are in a fight with a government trying to shut them down. Dozens on the government's list for closure are funded by charities and church groups based in the UK.

With widespread concerns about abuse, trafficking and exploitation of children growing up in orphanages are funders in the UK doing enough to make sure their donations aren't doing more harm than good?

Reporter: Anna Cavell

When secure training centres were launched nearly two decades ago they offered child offenders the opportunity to learn from their mistakes and get their lives back on track in a safe environment.

Today there are three units in England, Medway in Rochester, Oakhill in Milton Keynes and Rainsbrook in Rugby, which provide 30 hours of education a week as part of the rehabilitation process.

But the units have been dogged by serious concerns over the treatment of young people, including allegations of abuse, the inappropriate use of restraint and unsafe living conditions.

File on 4 investigates youth custody and reveals the scale of concern about life in secure training centres.

The Government has acknowledged there have been unacceptable levels of violence in youth custody and has recently announced a new generation of secure schools, which promise to equip young offenders with the skills to live successful, crime-free lives.

Reporter: Simon Cox

Photo Credit: Press Association

Northern Ireland has some of the highest rates in Europe of pollution linked to agricultural waste – the by-product of intensive pig, poultry and cattle farming. One solution is to turn the waste into energy through green recycling schemes that attract multi-million pound subsidies. But is the system being ‘gamed’ by industry?

An investigation by BBC Radio 4’s File on 4 programme has found that some waste-to-energy schemes are receiving public cash despite operating without planning approval. Their aim was to reduce harmful emissions and pollution, but there are mounting concerns that some schemes have exacerbated environmental harm. The energy regulator OFGEM is responsible for administering the waste-to-energy schemes. Are they doing enough to protect the public's money and has yet another green subsidy effectively back-fired?

Reporter: Lesley Curwen