Where companies say they live

Methodology

Live companies in the official monthly Companies House bulk snapshot whose full registered-office postcode resolves to a London local authority, aggregated to postcode district. Colour is a 0–100 relative concentration index: 100 is the largest mapped postcode count, while selecting a cell reports the exact count and its share of the mapped London total. The cells are nearest-centroid tessellations for comparison, not Royal Mail boundaries. Read this as registered-office administration, not workplaces, jobs or output: shared offices and formation-agent addresses can dominate a district.