If you bank with Barclays they offer a regular saver account into which you can deposit up to �250 per month for a year which pays about 10% interest. I believe certain other banks offer similar deals. If you're a taxpayer I'd stick the �1000 in the best cash ISA you can find on the internet, (most currently offer around 5%), take advantage of the regular saver account for a year and then when the account matures at the end of the year, add the money to your cash ISA. Alternatively, for the small amount of interest you would lose, if you don't want that kind of hassle, drip feed your �50 into the same cash ISA as you invested your �1,000. You can contribute up to �3,000 in any tax year and you will get the interest free of tax. Be sure to check before opening it that there's no penalty for transferring it to another provider if you find one which is offering a better rate of interest. If you Google "Best savings rates for ISAs", you'll get plenty of suggestions regarding accounts.
ICICI offer about