12 Tones of London

London's demographics explored by processing 2011 Census data with a statistical sorting method called cluster analysis. Attention is then focused on the sounds of the 12 archetypal council wards emerging from the study.

Cluster 11

Highest for English as the main household language, administrative occupations, White British population, domestic gardens as a proportion of land area, semi-detached houses, and mortgages. Second highest for average age, detached houses, and outright ownership of homes. Lowest for Mixed Race and Other Ethnicities populations, and purpose-built flats. Second lowest for households without a car, Other White and Bangladeshi populations, non-domestic buildings as a proportion of land area, house conversions, and social housing.


Mean age: 39.2.

Main occupation groups – Professional: 18.7%. Administrative: 15.7%. Technical: 14.2%. Skilled trades: 11.1%. Directors/senior officials: 10.8%.

Long-term unemployed: 2%.

Main ethnic groups – White British: 71.5%. Other White: 6.1%. Indian: 3.9%. Other Asian: 3.9%. Mixed Race: 3.4%. African: 3.4%.

English as main household language: 88.2%.

Households without a car: 21.5%.


Residents per hectare: 50.3.

Main land use types – Domestic gardens: 39.5%. Green space: 25.5%. Roads: 13.8%. Domestic buildings: 11.1%. Non-domestic buildings: 3%.

Main housing types – Semi-detached: 41.8%. Terraced: 26%. Detached: 8.5%. Conversions: 3.3%. Flats: 1.5%.

Main tenure types – Mortgaged: 40.3%. Owned outright: 34%. Privately rented: 12.9%. Social housing: 11.3%.


Total wards: 67.

Wards with silhouette values above 0.2 in descending order: Cavendish (Hillingdon), Nonsuch (Sutton), Whitton (Richmond upon Thames), Christchurch (Bexley), Blackfen and Lamorbey (Bexley), Blendon and Penhill (Bexley), Brampton (Bexley), Carshalton Central (Sutton), Falconwood and Welling (Bexley), Manor (Hillingdon), Worecester Park (Sutton), Town (Enfield), Sutton North (Sutton), Wallington North (Sutton), St Andrew's (Havering), Coldharbour and New Eltham (Greenwich), Wallington South (Sutton), Hacton (Havering), Endlebury (Waltham Forest), Eltham North (Greenwich), Shirley (Croydon), North End (Bexley), Stonecot (Sutton), Pettits (Havering), Longlands (Bexley), Bush Hill Park (Enfield), Hylands (Havering), The Wrythe (Sutton).

Medoid/lowest average distance within: Sutton North (Sutton) 22,12.

Highest silhouette value: Cavendish (Hillingdon) 0.3630.