HMRC
https://www.gov.uk/government/organisations/hm-revenue-customs
Companies House
https://www.gov.uk/government/organisations/companies-house
Health & Safety Executive
http://www.hse.gov.uk/
Business Link
https://www.gov.uk/browse/business
Federation of Small Businesses
https://www.fsb.org.uk/default.aspx?loc=general&id=0&loc=general&id=0