Nationwide Building Society's online banking down 23 April 2013 Last updated at 15:28 Customers of Nationwide have been unable to access account information after computer problems struck at the building society. Online banking has been unavailable and some customers have been unable to access account details in branches. The building society has apologised and says that it is working as quickly as possible to fix the problem. It is not the first electronic failure to hit Nationwide. An error led to double payments being taken last July. Some 704,426 account holders saw money taken from their accounts twice on that occasion. Nationwide said that was caused by a "one-off human error." Website message Nationwide, the biggest building society in the UK, has about four million customers. Customers have complained that some services have been down for much of the day. The mutual, owned by its members, said that an IT issue was affecting services including its Online Bank. A message on its website told customers that online banking was unavailable. Customers can still use ATMs to withdraw cash and check their balance and our branches are open to deal with our customers' needs. Customer debit and credit cards are not affected," a Nationwide spokesman said. We apologise for the inconvenience this has caused and we are working to resolve the issue as quickly as possible. The problem comes a week after customers of Lloyds TSB and Halifax reported problems accessing their accounts via the internet.