Jenny Cuffe talks to foster parents who find themselves battling with local authorities over the children in their care. They describe a Kafkaesque nightmare where doors are shut, telephone calls and emails unanswered, even court orders are ignored. Meanwhile, vulnerable children are treated as pawns as social workers move them from one place to another.

In one case investigated by File on 4, foster parents who offered to care for four siblings were denied the financial and practical support they needed from the council. Their official complaints were upheld yet key recommendations continued to be ignored and, as a consequence, the children have now been split up. After giving up their jobs to care for the children, the couple are now in debt and have to sell their home. The local MP describes the council's treatment of the family as outrageous. He says the case is extreme but not unusual and he's called for an enquiry.

A recent report identified a shortage of foster carers in the UK but are some councils driving away the people who should be their best resource?

Producer: Sally Chesworth.

Are families getting justice in the coroner's court?

With plans for future use of London's Olympic stadium in disarray, Allan Urry asks whether taxpayers' billions will leave a lasting legacy from 2012.

London's successful bid to stage the 2012 Olympics placed great emphasis on the benefits it could create for Britain and its capital city. Not only should the Games bequeath impressive new sporting facilities to the people of London, but the event and its aftermath was expected to kick-start economic development in the East End -- still one of the least prosperous parts of the country.

Has the forward planning paid off? Controversy and confusion still shrouds the future ownership and operation of London's Olympic stadium. Despite bids from rival football clubs, the stadium remains in public ownership. The Olympic village meanwhile has been sold to developers at a loss to taxpayers, and some critics claim a major opportunity to embed a new science and technology research centre on the Olympic park has been squandered.

With mounting pressure on Games organisers and Government to recoup the taxpayers' investment in the Olympics, many Londoners fear that the early promises of economic regeneration for the East End will fail to materialise.

Reporter: Allan Urry

The Justice Secretary Ken Clarke wants more jobs for convicts. He told his party conference: "If we want prison to work, then our prisoners have got to be working". He encourages private companies to open workshops inside prisons, where inmates would be 'properly paid' for hard work, would pay their due of taxes and help fund victims' support.

World leaders preparing for the G20 conference are facing a threat to the global economy from the on-going Eurozone sovereign debt crisis. But as they try to avert further economic catastrophe some investors see opportunities to profit from the mayhem.

Michael Robinson reveals how on-going economic volatility and uncertainty can also present golden investment opportunities - and how, through complex trades, bets and investments, some find cash in the current crisis.

Producer: Gail Champion

Earlier this year, an imam working in Stoke-on-Trent was jailed for raping a 12 year old boy at his mosque. In the wake of the case, File on 4 investigates whether the thousands of children who visit mosques and madrassas each week to study the Quran are being properly protected.

The leader of the Muslim Parliament of Great Britain has warned that without urgent action, his religion could face an "avalanche" of historic cases similar to the ones which have swamped the Roman Catholic church. Already, several other abusers whose crimes remained undetected for decades have been brought to court.

How can parents be sure their children are safe in unregulated madrassas where no-one ensures proper criminal record checks are made on staff and volunteers? And should the ban on corporal punishment in schools be extended to cover madrassas when some children still face physical punishment?

With the Government's controversial reforms under fire from countryside campaigners, Allan Urry investigates radical changes to the planning system.

Ministers insist more housing is needed, fuelling fears of greenfield sites being bulldozed. But as they begin to slim down bureaucracy to speed up development, how many more homes are actually getting built?

Under the localism agenda, communities are being told they'll get much more say about who builds what in their neighbourhood. But what happens if it's a waste incinerator or a power station? The programme reveals how local objections are likely to been given much less consideration.

Household gas and electricity bills are set to soar, leaving millions at risk of 'fuel poverty' and vulnerable to cold as winter approaches.

The Department of Health wants to slash £1.2 billion off the bill for hospital supplies -- everything from bandages and rubber gloves to operating tables and medical equipment.

The planned savings form part of the £20 billion in NHS efficiency savings the Government has pledged to make by 2014.

There's plenty of scope for savings. A recent survey found one Hospital Trust bought 177 different types of surgical gloves. Across the NHS, hospitals buy more than 1,700 different kinds of canula. Rationalising this medical shopping list could free-up £500 million a year for investment in patient care, the National Audit Office estimates.

But can the increasingly complex NHS procurement system in England deliver the major savings the Government wants to see?

Critics say Foundation Hospital Trusts increasingly make their own buying decisions, with little or no national co-ordination. Inside hospitals, managers tasked with purchasing millions of pounds worth of equipment often lack the authority or the support of their superiors to drive through savings. Meanwhile new private sector companies are moving in to take over the purchase and supply of NHS equipment.

Will the Government's plans for a more devolved health service help or hinder the drive to save taxpayers' money. Jenny Cuffe investigates.

Producer: Andy Denwood.

The criminal exploitation of the internet poses one of the biggest threats to UK national security. As organised crime gangs and terrorists use it to communicate and plan their activities, the police and security agencies are turning to hacking to conduct surveillance and gather intelligence.

In the first of a new series, File on 4 looks at the covert techniques being used to get beyond the firewall of a suspect's PC. But are the tactics legal? One leading expert says the rules governing interception are inconsistent and on occasions, misinterpreted by the police.

Reporter Stephen Grey also examines the way British companies are helping to proliferate this hi-tech snooping to countries with questionable human rights and which use it to monitor political opponents and dissidents.

And, with the Ministry of Defence developing its defences against sophisticated international attacks how vulnerable is the UK to "cyber warfare". Why did a Chinese state telecommunications company briefly 'hijack' most of the world's internet traffic one day last year?