Best savings account?

What is the best bank or building society for a savings account. ive got £800 and i want a high interest rate for my savings?
Answer
Best rate i found was a post office saving account if you dont need the money just yet get a isa you can save up to £3000 infact best site to read on savings is www.moneysavingexpert.co.uk he is great martin is on tv and radio all the time he knows whats he talking about