Here's a few web sites which you may find useful.
Provide help and guidance on employment related matters
HM Revenue & Customs
Up to date information on tax, national insurance and vat for both individuals and businesses
Provide information on existing companies, company formations, company names, annual return filing etc
Nottingham Business Ventures
Advice and support for starter business in the Nottinghamshire area
Comprehensive information on business grants currently available.
Practical advice for businesses
Federation of Small Businesses
Lobby to promote & protect the interests of the self-employed and small business owners in the UK
A comprehensive site covering a range of public services. Useful for tax credits, benefits and employment information.