Plans to force all schools in England to become academies will be outlined in the budget on Wednesday.
The Department for Education is expected to publish draft legislation as early as Thursday, BBC Newsnight has learned.
The move would end the century-old role of local authorities as providers of education.
An aide to the education secretary has declined to comment.
Back in October, David Cameron said he wanted "every school an academy… and yes - local authorities running schools a thing of the past".
At the autumn statement, the…