More than one in 10 teachers working in west London is not qualified, according to figures from the Department of Education.
Results show 12.2% of teachers working in Westminster's state schools and 11.1% in Kensington & Chelsea do not have Qualified Teacher Status (QTS), as of November 2014, one of the lowest rates in England.
Of these, just 9.1% in Westminster and 10.3% in Kensington & Chelsea are working towards getting their qualifications.
Ealing, on the other hand, has the highest levels of qualified teachers in west London, but still just 95.4% with qualified status.
At Kensington Aldridge Academy, just one in six (15.8%) of teachers have qualified status, one of the lowest levels in England, while just 38.8% of teachers are qualified at Westside Free School in Hammersmith & Fulham.
Across England, there were 24,300 teachers regularly working in schools without Qualified Teacher Status, as of November 2014, up 11% from 21,900 in 2013.
QTS is usually gained through getting a PGCE, although some degrees also give the status. Some unqualified teachers, like those in Teach First, will be working towards a PGCE or equivalent while teaching.
During the election campaign, the Conservatives and Liberal Democrats claimed the number of unqualified teachers had fallen since 2010, from 17,800 full-time equivalent (FTE) teachers to 17,100 in 2013.
However, figures released earlier this month now show there were 20,300 FTE teachers in November 2014, a rise of 18.7% compared to 2013 and the highest level since January 2009, the earliest figures are available from.
Proportions of qualified teachers in schools may have changed since November, as teachers are recruited or finish qualifications.
