Sorry, this deal has now expired. No need to worry though as we have plenty more deals like it for you to choose from...
While this account can be opened online it can only be managed by post or over the phone which is not going to suit every potential investor.
Also, despite the 1% bonus (payable until 21st April, 2010) the rate of interest paid on this account is variable and so it could drop at any time. This means that you will need to keep an eye on the interest rate to ensure that it remains competitive.
Finally, M&S do offer this account as either a full or partial fixed rate option too. However, while this can be tempting, better returns are available on other 'standard' fixed rate Cash ISAs so it's worth comparing it with the other accounts available before you sign up.