A flurry of people took to Twitter and Facebook to complain about problems paying for things with their Yorkshire Bank debit cards. A spokesman for the bank yesterday said it was experiencing problems with some Mastercard debit transactions, but said credit card payments were unaffected and the bank’s ATM network was working. He said: “We have put advice on the online banking site and recorded telephone messages to advise customers of the issue and that the ATMs work normally and also to apologise to our customers for any inconvenience.”