File on 4 Investigates

The Government is currently deciding what to do with the UK's civilian plutonium stockpile - the largest in the world. Some are concerned that it could become the target of terrorists intent on making a dirty bomb.

The stockpile has come from nuclear waste that was reprocessed to extract plutonium which was to have been used to power a new generation of fast breeder reactors. But that project failed to be finished and now just over 100 tonnes of it is being stored at Sellafield in Cumbria. The stockpile grew even more when the UK received imports from Japan and Germany which it had hoped to convert into fuel - again this project has failed to deliver.

The Government is considering a number of options.

Convert the plutonium into mixed oxide (Mox) fuel and then burn the fuel in conventional, nuclear reactors. This would involve the construction of a second Mox fuel plant at Sellafield despite the fact the first plant failed to produce any significant amount of Mox and was closed in 2011.

Burn the plutonium in a new breed of Prism fast reactors. But critics say the technology is not proven and therefore risky.

Treat it as a deadly waste product and bury the plutonium currently stored at Sellafield deep underground for thousands of years. Again critics say burying waste is risky and even then the plutonium would have to be treated before it could go into the facility. Supporters of plutonium as fuel still claim that would be throwing away a potentially valuable asset. On top of that we are not likely to have a repository for decades and very few local authorities have volunteered to consider having it in their back yard.

Rob Broomby investigates the difficult questions facing the Government whose decision will potentially bring in a bill for the taxpayer of billions of pounds.

Producer: Ian Muir-Cochrane.

21 years after the signing of the Maastricht Treaty, Britain is trying to cut the cost of the European Union.

As the institution comes of age, Gerry Northam asks whether the EU's spending on itself has become excessive and - if so - whether member states do anything about it.

In Brussels, hundreds of millions of pounds have been found for projects described by Eurosceptics as "self-aggrandisement". An art deco showpiece is being transformed into a new headquarters for the European Council at a cost of around 300 million Euros (£250m). A further 55 million Euros (£46m) is going to create a House of European History - a museum celebrating European integration. A new 20 million Euros (£17m) visitors' centre at the European Parliament, called the Parlamentarium, has been dismissed as a multimedia tribute to itself.

Meanwhile alarm has been raised that money the United Kingdom designates as aid for developing countries is being diverted by Europe to encourage Turkey, Serbia and others to join the Union. MPs claim this money directly disadvantages Britain.

Critics say Europe's expansion comes with an unnecessarily large price tag. Are they right?

Reporter: Gerry Northam

Surrey police are probing the mystery death of a Russian exile who was helping to locate millions of dollars missing from the Russian treasury. City experts claim London is one of the routes for those laundering the proceeds of Russian crime. Britain is also now a destination of choice for many wealthy Russians. But how much do we know about some of those who choose to settle here? Internationally, there's tension between Washington and Moscow over the Magnitsky Act, in which the US introduced new sanctions for Russian officials suspected of corruption, freezing their assets and barring their entry to America. Prominent MPs are arguing for similar measures here. So is Britain too lax in cases where suspicions are raised?

After a series of controversies over the tax bills of multinationals such as Google and Starbucks, ministers have been talking tough about avoidance. But as new tax rules come into operation, Fran Abrams looks at the reality behind the rhetoric. Will these new regulations halt the decline in corporate tax revenues? And why were so many major companies involved in writing them - even as their own tax affairs were coming under scrutiny?

The government and senior medical figures want consultants to be more hands on in hospitals at weekends and at night. It follows evidence patients are less likely to receive prompt treatment and more likely to die if they are admitted to hospital on a Saturday or Sunday. A recent survey of hospital chief executives showed they had significant doubts their hospitals were as safe at weekends as during the week.

Jane Deith examines cases which raise concerns about out of hours care in hospitals. Is there enough senior medical support for junior doctors and how effective is the on-call system where consultants are available to give advice over the phone from home?

While departments such as accident and emergency, intensive care and obstetrics, already have consultants working in hospitals during the weekend, some medical colleges believe the time has come for 24 hour, seven days a week consultant cover on the wards. Jane visits hospitals trying to achieve this and hears the challenges they face.

The programme also investigates what this increased consultant presence might cost the NHS and whether there will be enough senior doctors available to make it happen. The College of Emergency Medicine, for example, says accident and emergency departments are facing a recruitment crisis and it does not expect to see the required number of consultants until 2030.

Producer: Paul Grant.

The recent conviction of an arms broker from Yorkshire has raised serious concerns about the murky world of the international weapons trade. Gary Hyde was sentenced to seven years imprisonment for one of the largest illegal arms deals ever uncovered: 80,000 guns and 32 million rounds of ammunition shipped from China to Nigeria - enough to equip a small army. But no-one knows where they ended up. Britain has strict regulations governing the sale and export of firearms, so how did he manage it? Where have the guns gone?

File on 4 investigates the British arms dealers brokering weapons for some of the world's most dangerous regimes. Some have done work for the Ministry of Defence. One was even a firearms advisor to the Home Office. Allan Urry asks what this means for the UK's licensing and arms export regimes, claimed to be among the best in the world.

Producer: Gail Champion.

Fed up with road works? Stuck in a queue of traffic? The Government is promising big improvements for drivers who use motorways and major roads. It's looking for ways to increase private sector involvement and to boost investment. So what future for the body that currently manages the network in England? With the CBI calling for it to be scrapped, and with criticism from local authorities and motoring organisations, Allan Urry road asks whether it's the end of the road for the Highways Agency?

It's estimated there are up to 150,000 so called zombie companies in the UK. They are often defined as businesses which are only able to pay off the interest on their debts and have little prospect of growing without restructuring or an injection of cash.

The BBC's Chief Economics correspondent, Hugh Pym, examines businesses caught in this situation and looks at what effect they are having on the UK economy. He hears from business experts who say these companies are partly responsible for the poor levels of growth. They say banks have huge amounts of capital tied up in businesses which are currently going nowhere and that means they have less money available to invest in more dynamic operations which have the ability to grow and create jobs. They say the banks are also unwilling to lend because they need to build up reserves to absorb losses if these businesses eventually fail.

Private equity investors such as Jon Moulton say in some cases the companies should be allowed to fail in order to let new businesses come through. But Hugh speaks to the head of a major bank's restructuring unit which is responsible for managing companies in distress who argues these companies can be nursed back to health and it is better to keep them alive and save jobs.

This decision often involves what is known as forbearance by the banks - where they ease or modify the terms of the loan to give a company breathing space. This is happening not only in business, but in the mortgage market too where billions of pounds of loans have been converted from repayment to interest only.

Some economists warn many of these debts will never be repaid and this means the banks aren't admitting to the true level of losses they are facing. Even the governor of the Bank of England is now warning of the dangers of forbearance and says banks should ensure they have enough funds to be able to draw a line under their losses.

Britain has 1.5 million people with learning difficulties, and the number is growing. Campaigners say the health service is struggling to cope: the number of specialist nurses is falling, and though extra support is supposed to be available for this vulnerable group, hospitals and other health facilities often struggle even to identify them.

Families say their relatives have been left to die in pain - and in some cases people who were not dying have had 'do not resuscitate' orders placed on their notes without being told. The learning disabled are more likely to be ill, more likely to be obese or underweight and more likely to die prematurely. And with health service cuts starting to bite, are things set to get worse? Fran Abrams reports.

Producer: Gail Champion.

In April next year, the SNP government in Scotland will merge 8 existing constabularies to create a single national police force. This is intended to bring efficiency savings by cutting out duplication of functions and gaining the economies of scale. But the move is proving controversial amid fears that it will damage local accountability and lead to worsening services in some areas.