Ofsted sounds warning over outstanding schools
Ofsted has called for the resumption of routine checks on outstanding schools, after 80% of those it re-inspected due to specific issues were downgraded.
England's schools standards watchdog re-inspected 305 schools rated outstanding, after concerns were raised about falling standards.
It said 256 lost their top-level rating as a result.
In 2011, inspectors were stopped from carrying out routine inspections of these top-rated schools.
The move, during Michael Gove's time as England's Education Secretary, aimed to focus resources on the worst-performing schools but was criticised at the time, as it meant hundreds of schools would not be checked at all.
Last year, Ofsted highlighted the issue, saying that as some schools had not been inspected for a decade or more, there was a chance their ratings no longer truly reflected standards at the school.