HMRC
HM Revenue & Customs.
http://www.hmrc.gov.uk/index.htm
Tax Rates & Allowances
http://www.hmrc.gov.uk/rates/index.htm
Paying HMRC
http://www.hmrc.gov.uk/payinghmrc/
COMPANIES HOUSE
Companies House Forms (Companies Act 2006) http://www.companieshouse.gov.uk/forms/formsOnline.shtml
Downloadable forms from Companies House for Companies registered under the Companies Act 2006.
Companies House Forms (Companies Act 1985) http://webarchive.nationalarchives.gov.uk/20140711154705/http://www.companieshouse.gov.uk/forms/formsOnline1985.shtml
Downloadable forms from Companies House for Companies registered under the Companies Act 1985.