Hundreds of secondary schools, including many top private schools, have seen their GCSE results plummet to zero following a shake-up of annual league tables.
Under the Government's overhaul, some combinations of English GCSEs and international GCSEs - often known as IGCSEs - do not count in the rankings.
As a result, many secondaries which took these qualifications have seen their results drop in a key government measure of school performance.
See how your school peformed here
More than 300 state schools fell below the bench mark and could now face action, including being closed down and turned into an academy or being taken over by a new sponsor.
The top performing areas who scored five GCSEs grade C or above were:
- Kensington and Chelsea (73.8%)
- Trafford (72.2%)
- Sutton (72.1%)
- Kingston-upon-Thames (70%)
- Buckinghamshire (69.5%)
The worst performing areas were:
- Knowsley (35.4%)
- Bradfordand Blackpool (44%)
- Nottingham (44.6%)
- Kingston-upon-Hull (44.7%)