Almost 40 per cent of London teenagers who sat exams last summer failed to pass five GCSEs at grade C or above.
The figures from the Department for Education are the first since ministers toughened the system, and banned re-sits.
In London 29,000 pupils failed to pass five GCSEs including English and maths.
These figures are up from 26,000 during the summer of 2013.
It means 38.5 per cent failed to meet the basic “five GCSE” benchmark, which has risen by 3.5 percent.
40 London schools, where 25,000 pupils are taught, are now at risk of being classed as failing.
Today's league table also placed some private schools including Westminster, St Paul’s and Dulwich College at the bottom, after the exams they used were not recognised.
To go through the league table in more detail was the Independent's Education Editor, Richard Garner.