A kind remind: when you change your address, don't forget to change your credit card address(Barclay). I met this problem, I just went to bank to change my address, but i found i have long time no receive my credit card statement. I call the credit card services number, then i found the address of my credit card was the old one. so, I am afraid I have to pay some additional fee for my delay pay back my credit card. WHat a mass!
Remeber to call them when you want to change your address!
I never go to the bank at the end of the month to clear my credit card mayment! You can sign an agreement with the bank, that your debt will be paied from your bank account automatically at the end of each month. So that you don't need to do anything, and you don't need to worry about the extra charge, if you forget to pay back on time.
And it's free of charge!