In case you didn’t know, 30 pupils to one teacher is the legal limit (with some exceptions) for infant classes in this country.
But in England there are now 74,009 KS1 children in classes over 30, up from 31,270 children in 2011.

Source: DfE statistics
Obviously some of this increase is simply due to the rise in the total number of KS1 children, but even after taking into account the increase in number of pupils, the proportion of children in classes over 30 has risen from 2.15% to 4.50%. That’s more than double…
And when it comes to secondary schools separate research undertaken by the School Cuts Coalition, shows that 62% of state secondary schools had larger classes last year than two years before.