Public bodies of all kinds now face massive budget cuts and are under pressure to deliver savings. As a result, across the country, public services of all kinds are now up for tender in the hope they can be delivered more cheaply by the private sector.

With relatively straightforward things such as refuse collection, there's general agreement that experience to date shows outsourcing can work, and can save the taxpayer money.

But with complex services in education, health or transport, the picture is far less clear.

Michael Robinson investigates the outsourcing of these complex public services and uncovers another, as yet unreported, example of huge profits being earned by major private companies at taxpayers' expense.

Producer: Rob Cave.