Add UK Companies House (#2241)

README.md

@@ -791,6 +791,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Open Government, UK](https://data.gov.uk/) | UK Government Open Data | No | Yes | Unknown |
 | [Open Government, USA](https://www.data.gov/) | United States Government Open Data | No | Yes | Unknown |
 | [Represent by Open North](https://represent.opennorth.ca/) | Find Canadian Government Representatives | No | Yes | Unknown |
+| [UK Companies House](https://developer.company-information.service.gov.uk/) | UK Companies House Data from the UK government | `OAuth` | Yes | Unknown |
 | [UK government API catalogue](https://alphagov.github.io/api-catalogue) | APIs from UK government organisations | No | Yes | Unknown |
 | [USAspending.gov](https://api.usaspending.gov/) | US federal spending data | No | Yes | Unknown |