In the UK, only one student account can be opened per person. This includes Natwest's Step Account and HSBC's Student/International Student Account.
If you are planning to get a credit card here, try to open a Natwest's Step Account. starting june 2005, international student must stay in the UK for at least 3 years before they can get credit card from HSBC, but Natwest can grant a credit card straight away for Step Account holder.
According to some of my friends' opinion, HSBC's internet banking is better than Natwest's.
Some of my friends opened Natwest's step account and HSBC's international student account simultaneously. by doing that, both of the banks can not check whether you already opened a student account from another bank. With this, you can get a credit card from Natwest and a convenient internet banking from HSBC.
However, policies can change. Make sure you check the fine print properly, as they change their policies quite frequent.
Last time i open Natwest cause HSBC need the student to stay at least 2.5 years and blah blah t&c. But my course mate manage to open in HSBC cause his bank draft is 25k pound where as mine is only 3k
So if you still want to open hsbc yet not meeting the requirement, make sure your old man give you big bank draft