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Average Size of One Teacher Classes, Maintained Schools 
| Primary | Secondary | |||||
| 1997 | 2009 | Difference | 1997 | 2009 | Difference | |
| City of London LA | 26 | 24.7 | -1.3 | 0 | . | . |
| Camden LA | 27.1 | 26.6 | -0.5 | 20.3 | 19.9 | -0.4 |
| Greenwich LA | 26 | 26 | 0 | 22.5 | 19.2 | -3.3 |
| Hackney LA | 26.1 | 25.8 | -0.3 | 22.3 | 20 | -2.3 |
| Hammersmith and Fulham LA | 25.3 | 26.2 | 0.9 | 22.6 | 20.6 | -2 |
| Islington LA | 26.6 | 25.5 | -1.1 | 24 | 21.9 | -2.1 |
| Kensington and Chelsea LA | 25.3 | 25.7 | 0.4 | 20.2 | 19.9 | -0.3 |
| Lambeth LA | 25.2 | 25.7 | 0.5 | 21.9 | 20.4 | -1.5 |
| Lewisham LA | 26.1 | 26.3 | 0.2 | 20.7 | 20.7 | 0 |
| Southwark LA | 26.4 | 24.5 | -1.9 | 24.4 | 20.5 | -3.9 |
| Tower Hamlets LA | 26.2 | 26.3 | 0.1 | 24 | 20.5 | -3.5 |
| Wandsworth LA | 25.8 | 25.3 | -0.5 | 22 | 20.5 | -1.5 |
| Westminster LA | 24.2 | 25.4 | 1.2 | 21.5 | 18.6 | -2.9 |
| Barking and Dagenham LA | 27 | 27.2 | 0.2 | 20.8 | 20.7 | -0.1 |
| Barnet LA | 26.2 | 27.6 | 1.4 | 19.8 | 19.5 | -0.3 |
| Bexley LA | 28.8 | 27.8 | -1 | 21.8 | 21.6 | -0.2 |
| Brent LA | 26.5 | 27.8 | 1.3 | 20.5 | 19.9 | -0.6 |
| Bromley LA | 28.5 | 27.7 | -0.8 | 20.4 | 20.3 | -0.1 |
| Croydon LA | 28.3 | 27.7 | -0.6 | 22.2 | 20.6 | -1.6 |
| Ealing LA | 27.1 | 27.2 | 0.1 | 22.4 | 20.5 | -1.9 |
| Enfield LA | 29.1 | 28.6 | -0.5 | 20.7 | 20.2 | -0.5 |
| Haringey LA | 26.9 | 27.5 | 0.6 | 21.6 | 19.6 | -2 |
| Harrow LA | 27.5 | 26.9 | -0.6 | 22.9 | 20 | -2.9 |
| Havering LA | 27.9 | 27.4 | -0.5 | 21.8 | 21.6 | -0.2 |
| Hillingdon LA | 27.2 | 27.2 | 0 | 21.1 | 19.6 | -1.5 |
| Hounslow LA | 26.8 | 27.4 | 0.6 | 21.1 | 20.3 | -0.8 |
| Kingston upon Thames LA | 29.4 | 27 | -2.4 | 20.2 | 20 | -0.2 |
| Merton LA | 27.3 | 27 | -0.3 | 22.7 | 22.6 | -0.1 |
| Newham LA | 27.9 | 27 | -0.9 | 24.5 | 23.1 | -1.4 |
| Redbridge LA | 28.4 | 29.2 | 0.8 | 21 | 20.4 | -0.6 |
| Richmond upon Thames LA | 27.2 | 26.9 | -0.3 | 24 | 22.1 | -1.9 |
| Sutton LA | 28.1 | 27.8 | -0.3 | 20.7 | 20.6 | -0.1 |
| Waltham Forest LA | 26.6 | 28 | 1.4 | 23.6 | 22.1 | -1.5 |
| London Region | 27 | 27 | 0 | 21.9 | 20.5 | -1.4 |
| England | 27.5 | 26.2 | -1.3 | 21.7 | 20.6 | -1.1 |
The average size of classes taught by one teacher in Maintained Primary Schools in 2009 was 26.2 down from 27.5 in 1997.
In Maintained Secondary Schools the average size of classes taught by one teacher in 2009 20.6 down from 21.7 in 1997.