HM Revenue & Customs: Rates and Allowances - Income Tax
There you go from the government itself ... the rates
Income Tax rates and taxable bands 2008-09 2009-10
Starting rate for savings: 10%* £0-£2,320 £0-£2,440
Basic rate: 20% £0-£34,800 £0-£37,400
Higher rate: 40% Over £34,800 Over £37,400
The link gives you all the details.