The Department for Education (DfE) has been criticised in a report by a group of MPs for taking two years to publish results into the collapse of the Wakefield City Academies Trust.
Eight thousand pupils were affected when 21 schools, which were run by the trust, collapsed in September 2017. The schools were located in towns and cities across Yorkshire including in Doncaster, Sheffield, Shipley and Goole.
In the report, published on Wednesday, the Public Accounts Committee (PAC) said academy trusts must be strengthened, and that the Department for Education's oversight must be more rigorous.
The report said Academy trusts were not sufficiently transparent or accountable to parents and communities, and made a recommendation that results into inquiries should be published within two months of the Education and Skills Funding Agency completing their analysis.
The PAC chairwoman Meg Hillier said:
The DfE said it disagreed with the findings in the report. In a statement, a spokesperson said: