The Co-operative bank is set to replace its 'flawed' online business banking system after complaints from customers, according to the BBC.
BBC Radio 4's Money Box programme found Co-op business customers are considering moving their accounts away from the bank after becoming frustrated with problems logging in and seeing their balances and accounts.
Businessman Marc Palmer told the programme that Co-op call centre staff informed him that the bank's IT system could not cope when several people were logged on at the same time.
"They've said to me they'd been told by the IT department that once it hits 130 simultaneous users, it starts to fall over," Palmer claims.
John Hughes, director, retail products, Co-operative Financial Services apologised to customers, conceding the technology is flawed, telling the BBC it is a "fundamental design feature of the system".
A new system will be introduced in the spring and 20 extra call centre staff are being drafted in in the interim.
Co-op customers attack IT flaws - BBC