# London's registered business sectors

> Ten recognisable sectors, counted across active registered offices in London postcode districts.

- Category: Money
- Cadence: monthly
- Status: Published on a monthly cadence.
- Dataset key: `registered-business-sectors`
- Source: [Companies House](https://download.companieshouse.gov.uk/en_output.html)
- Licence: Open Government Licence v3.0 — [terms](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Canonical page: [https://londongraph.com/g/londons-registered-business-sectors](https://londongraph.com/g/londons-registered-business-sectors)
- Machine-readable record: [https://londongraph.com/data/londons-registered-business-sectors](https://londongraph.com/data/londons-registered-business-sectors)

## Methodology

Live companies in the official monthly bulk snapshot are restricted by full registered-office postcode to London, then matched to ten transparent SIC-code groups. Select a sector to compare its distribution: colour is a 0–100 concentration index within that sector, while selecting a cell reports the exact registered-company count and its share of the mapped London sector total. A company can declare several SIC codes and can therefore appear in more than one sector. The cells are nearest-centroid tessellations, not Royal Mail boundaries. These are registered offices rather than workplaces, shops, employment or output; shared addresses can dominate a district.

## Visualisations

- [Map](https://londongraph.com/g/londons-registered-business-sectors): Ten recognisable sectors, counted across active registered offices in London postcode districts.
- [Distribution](https://londongraph.com/g/londons-registered-business-sectors?view=distribution): Place every mapped area in the selected measure's distribution while preserving missing values.
- [Concentration](https://londongraph.com/g/londons-registered-business-sectors?view=concentration): Show how quickly the total accumulates across the largest places or categories.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.