When the FCA (Financial Conduct Authority) told UK banks not to charge exuberant unauthorized overdraft fees, I doubt they expected banks to start charging all customers 40% per annum just to use their overdraft.
I, for one, have decided to stop dipping into my overdraft after my bank / building society decided to double the interest rate. I still keep it there as a dire emergency, but as for its regular use, that has come to an end.
It is cheaper to use a credit card transfer into your bank account and then pay the credit card. How crazy is that? It is now cheaper to use your credit card than a bank / building society overdraft.