The Co-op Bank says it is putting itself up for sale and is inviting offers to buy all of its shares.
The bank, 20% owned by the Co-operative Group, almost collapsed in 2013, and was bailed out by US hedge funds.
The bank has four million customers and is well known for its ethical standpoint, which it says makes it "a strong franchise with significant potential" when it comes to a sale.
A sad and worrying time for all Co-op Bank customers.
Please consider joining the Customer Union for Ethical Banking to help protect the future of our bank.