Customers of Yorkshire and Clydesdale banks are still experiencing problems using their debit cards a week after the banks' system operations were transferred to external contractor First Data.

The IT glitch was first reported on Sunday 4 March, and then reoccurred on Tuesday 6 March. However, customers have continued to report issues with using their cards to pay for goods and services over the telephone and online.

On Saturday morning (10 March), a Yorkshire Bank customer took to Twitter to voice his discontent.

"Just went to book tickets for Cheltenham, but yorkshire bank cards are not working online, okay then :-) cheers for that. #switchingbanktime," William James posted on Twitter from his @TeamCena_Will account.

The problem was still not resolved the next day, as he posted: "cant believe yorkshire banks still broke, all i want is a Cheltenham ticket :@:@"

In addition, a customer posted a message on a forum about the Yorkshire Bank problems on

Forum user slik321 wrote on 11 March: "I'm still having problems. I was able to make payments until 2 or 3 days ago. I only ever buy things online...This is really ticking me off now as it's my mum's birthday on Saturday and I can't use my card to buy her a present."

While these complaints were related only to Yorkshire Bank, Clydesdale Bank has posted a message on its website saying that it is working to resolve problems "caused by the debit card service disruption on Sunday".

A spokesperson for the banks reiterated a previous statement: "While our debit card service continues to operate normally, we are working to resolve any remaining problems caused by the service disruption.

"We apologise for any inconvenience caused and are continuing to deal with customers sympathetically. Customers will not be financially disadvantaged and we will investigate related claims on a case-by-case basis."

The debit card problem is not the first IT problem that the banks have experienced in recent years. In 2010, a software update error caused thousands of Clydesdale Bank and Yorkshire Bank customers to make incorrect payments on their variable-rate mortgages.