Yorkshire Bank took place in the bank's heartland and many miners were customers, having been encouraged by the National Coal Board to have their pay mandated to a bank account. In 1990, the National Australia Bank Group acquired the bank from the consortium of owning banks which, after mergers and acquisitions, were the National Westminster Bank, (holders of 40%), Barclays Bank (32%), Lloyds Bank (20%), and Royal Bank of Scotland (8%). The price paid was £1 billion and the bank joined National Australia Bank's other European businesses, Clydesdale Bank (Scotland) and Northern Bank (which operated in both jurisdictions in Ireland). In May
International Bank Account Number account not only the generation of check digits but also the handling of legacy bank codes, thereby enabling third parties to generate IBANs independently of the bank. The first such catalogue was published in June 2013 as a variant of the old bank code catalog ("Bankleitzahlendatei"). Banks in numerous non-European countries including most states of the Middle East, North Africa and the Caribbean have implemented the IBAN format for account identification. In some countries the IBAN is used on an "ad hoc" basis, an example being Ukraine where account numbers used for international transfers of four of the national banks