Use Companies House data to help keep the WhatDoTheyKnow database up-to-date

[RichardTaylor]

Seek to:

• Identify defunct / inactive companies.
• Spot and act on company name changes.

Companies House data download which might help us do this

https://download.companieshouse.gov.uk/en_output.html

or we could obtain data via their API

https://developer-specs.company-information.service.gov.uk/companies-house-public-data-api/reference

Related ticket for NHS bodies: https://github.com/mysociety/whatdotheyknow-theme/issues/828