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 5

Highest for average age, detached houses, and outright ownership of homes. Second highest for green space as a proportion of land area, and mortgages. Lowest for households without a car, population density, Bangladeshi population, non-domestic buildings as a proportion of land area, and social housing. Second lowest for long-term unemployed, Mixed Race, African, Caribbean and Other Ethnicities populations, roads and domestic buildings as a proportion of land area, and purpose-built flats.


Mean age: 40.8.

Main occupation groups – Professional: 24%. Technical: 15.7%. Technical: 12.3%. Directors/senior officials: 14.9%. Administrative: 14.2%.

Long-term unemployed: 1.7%.

Main ethnic groups – White British: 66.6%. Indian: 7.8%. Other White: 6.9%. Other Asian: 4.2%. Mixed Race: 3.5%.

English as main household language: 86.8%.

Households without a car: 17.4%.


Residents per hectare: 25.

Main land use types – Green space: 46.1%. Domestic gardens: 31.2%. Roads: 9%. Domestic buildings: 6.8%. Non-domestic buildings: 1.6%.

Main housing types – Semi-detached: 33.1%. Detached: 27.6%. Flats: 20.7%. Terraced: 13.4%. Conversions: 3.5%.

Main tenure types – Owned outright: 38.2%. Mortgaged: 37.2%. Privately rented: 13.9%. Social housing: 1.6%.


Total wards: 49.

Wards with silhouette values above 0.2 in descending order: Ickenham (Hillingdon), Chislehurst (Bromley), Sanderstead (Croydon), Eastcote (Hillingdon), Pinner (Harrow), Northwood (Hillingdon), Monkhams (Redbridge), Chelsfield and Pratts Bottom (Bromley), Kenley (Croydon), Stanmore Park (Hillingdon), Farnborough and Crofton (Bromley), Cheam (Sutton), Coulsdon East (Croydon), Hatch End (Harrow), Bickley (Bromley), Uxbridge North (Hillingdon), Canons (Harrow), Darwin (Bromley), High Barnet (Barnet), Emerson Park (Havering), Cockfosters (Enfield), Coulsdon West (Croydon), West Ruislip (Hillingdon).

Medoid/lowest average distance within: Uxbridge North (Hillingdon) 26.25.

Highest silhouette value: Ickenham (Hillingdon) 0.3593.