Sorry for hijacking your thread but I'd also like to know the answer to this.
I have a 0% overdraft on my current account. Each week after I pay my bills I transfer all my cash out of the account to my Northern Rock savings account except for €100. Due to the nature of my job, I basically go anywhere from €200 to €1000 into my overdraft each week. Once I get payed, the overdraft is always cleared, then the cycle continues. Will this affect my credit rating?