Mike Tomlinson will today unveil plans for sweeping reforms of school-age qualifications.

Charles Clarke is expected to back the former chief inspector of schools' proposals, which include abolishing GCSEs and A Levels within a decade and replacing them with a diploma for all students aged 14 to 19.

However, business leaders are warning that standards could decline.

John Cridland, the deputy director general of the CBI, said that while members wanted radical action they "will take some convincing that a major shake-up of exams will resolve the issue".

Unions however are welcoming the plan.

David Hart, the general secretary of the National Association of Head Teachers, said: "What I want from the government is strong support for the Tomlinson report - I don't want any fudge."