The English Indices of Deprivation have, since 2004, been produced at Lower Level Super Output Area (LSOA) level. LSOAs are smaller than constituencies and are designed to remain consistent in size, and over time, to allow more detailed identification of pockets of deprivation. This also overcomes difficulties in producing statistics for electoral wards and parliamentary constituencies which are associated with frequent boundary changes. There are 32,482 LSOAs in England with an average population of 1,500 people.
The income scale measure from the local authority summaries for the 2007 indices represent the number of people within an area experiencing income deprivation. The local authority summaries can be downloaded from the CLG website: