It is or was quite ordinary for a British business or personal bank current-account to provide overdraft authorisation up to a certain amount; easy borrowing by a more-or-less trusted customer - with interest charged, of course. I think my information is from journalist Alistair Cooke's radio broadcasts from America - he died in 2004 though - that this basically doesn't exist in the U.S. and is considered perverted. More formal loans with regular repayments also exist. And credit cards.
Since some time in the 1980s, I think, most British personal bank accounts don't charge for your individual transactions when the account is in credit, which means basically that your bank earns money from the relationship by selling other services or by charging the customers whose account is in overdraft. That's often an unwelcome surprise. The fairness of overdraft fees has recently been scrutinised.