Opening a bank account is not really complicated, but it can be difficult for foreigners. You must take along with you proof of identity and proof of address (passport, driving licence, bill from a company with your address on it). You will also need a recent account statement if you hold an account with another bank or building society (or details of your bank abroad).
You can contact:
You have a difference between a Debit
Card and a Credit Card
(Visa or Master Card). With the first one, your money
will be debited directly from your bank account; with
the second one, you are debited from a specific account,
that you will pay back according to your wishes and
in agreement with the bank (you may get gift points
for use).
You negotiate an overdraft limit
with the bank. If you pass this limit, a global penalty
will be applied (about £20), you will pay a penalty
for every item up to the limit (about £20 per item),
and of course a high interest rate (20%/year).