how to double your money!?

[Gandalf]

Put into a ISA account and leave it in during the uk tax year(April to april)for 12months,and you'll get interest on it tax free within a year.

The quesion was how to double your money, not make 1.8% interest tax-free!

Are interest rates that low in the UK?

If so, all I can say is wow! I just opened a new savings acocunt last week out here and the interest was 4.9%. Anything less and your money is effectively shrinking in real terms anyway.