Companies House:
Check your accounts online using the free Webcheck Service or search to see if your proposed limited company name is already in use.
HM Revenue & Customs:
The Government site where you can find information on VAT, Self Assessment, CIS and Employment related queries.
Sage:
Want to know more about Sage? Use this site to look at the products on offer.
UK Government Free Advice:
Easy access to the public services you use and the information you need.