Very.co.uk - Make a purchase without opening a credit agreement?

Hi,
Has anyone been able to make a purchase through very.co.uk without entering into a credit agreement? If so I would be grateful for some advise as to how to go about opening such an account with them, I.e. is there a particular check box I need to leave unchecked while signing up with them online or something.

Thanks for your help guys and gals.