Poorer children are more likely to fail their exams than their richer peers according to new figures, raising fears about increasing inequality in state education.

Britain’s poorest children are at a greater risk of attending a failing school than pupils from the wealthier backgrounds, Government data suggests.

A new analysis of official data by the Conservative party indicates that the achievement gap in education between rich and poor children is increasing.

Those from the most deprived backgrounds have more than a 50 per cent chance of ending up in a school that the Government considers to be failing because it has not reached the target of 30 per cent of pupils gaining five A* to C grades at GCSE, including English and Maths.

This compares with just three per cent of children from the most well off homes attending a failing school.

A spokesman for the Department for Children, Schools and Families said that Ed Balls, Schools Secretary aimed to tackle the problem in two areas with a history of ingrained disadvantage, lower educational achievement and wide variations in children’s attainmaint. The programmes launched this week in Manchester and the Black Country will aim to raise the number of schools reaching the Government's target of 30 per cent A* to C grades at GCSE.

Mr Balls said: "Every parent wants their child’s school to be a great school, where pupils get good grades in their GCSEs. That's why it is right for us to focus extra support on those schools where less than 30 per cent of the pupils get five good GCSEs including English and maths."

Across the board, the numbers show a strong link between a child’s background and their chances of educational success in the state sector. They also provide evidence that the poorer the child the higher the probability of them attending a failing school.

The figures were released in answer to a parliamentary question put to Jim Knight, the Schools minister by Michael Gove, the Shadow Education Secretary and show Britain has a long way to go before achieving a classless education system. They were compiled from the School and College Achievement and Attainment Tables from 2007.

Mr Gove said: "There is a growing gap between the standard of schools in richer and poorer areas. We must give teachers the powers they need to keep order, improve reading teaching, and have more teaching by ability.”

Dr Lee Elliot Major, Director of Research at The Sutton Trust, a charity which gives educational grants to children from underprivileged backgrounds said: "Unless we address such deep-rooted educational inequalities, the UK will continue to languish at the bottom of the international league table of advanced countries when it comes to social mobility. Breaking the link between poverty and academic attainment is a major challenge, but one that needs to be addressed both for reasons of economic prosperity and social justice."

David Laws education spokesman from the Liberal Democrats said: "We simply can't accept a situation where over half of the schools in the most depressed areas are failing to get the overwhelming majority of their pupils up to a good exam standard."

“These figures reinforce the case for introducing a Pupil Premium which would target extra money on young people from more deprived backgrounds, bringing their level of education funding up to levels in the private sector.”

In the scramble for the best schools parents are prepared to lie and cheat the system according to a Local Government Association report in March. Out of 31 councils surveyed 24 said they had seen an increase in cheating. The figures for 2007-08 were nine times higher than two years ago.

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