Here are the links you might need to help you with your business.
We don't know why the Government doesn't register some easy-to-remember alternate urls like www.complex-forms.com for Companies House, and www.hand-it-over.com for HMRC.
Companies House Homepage http://www.companieshouse.gov.uk
Companies House Webcheck Service http://wck2.companieshouse.gov.uk
HM Revenue and Customs http://www.hmrc.gov.uk/index.htm
PCG Professional Contractors Group http://www.pcg.org.uk/cms/index.php