Mute inglorious Milton.

According to the BBC, poverty is linked to poor language acquisitiion among poor children.

Children from the poorest homes are almost a year behind middle class pupils in language skills by the time they start school, research suggests.

Now, as of 2008, according to the Lambeth State of the Borough report:

The proportion of children and young people living in poverty is higher than average, as is infant mortality, teenage pregnancy, childhood obesity, primary and secondary school permanent exclusion levels and the proportion of 16-18 year olds who are not in education, employment or training.

Lets put this into perspective with some detail

Two in five (41%) London children live in poverty compared to 28% nationwide. This rises to 51% in Inner London. Borough level figures are not available, but Lambeth can be expected to exceed the Inner London figure. Just over a third (33.8%) of children in Lambeth live in families on key benefits compared to 24% in London; Lambeth ranks as the 11th highest in Great Britain and more children live ‘in care’ in Lambeth than across the capital and the rest of the country (110 per 10,000 children under 18 were looked after, compared to 70 in London and 55 in England).

Over half of children in Lambeth are living in poverty. That's half who will be robbed of their potential to achive by the cumulative drag on life chances created by poverty. So much for Labour's pledge to end child poverty. They've barely dented it.