If you have a credit union current account with us (a CUCA), it may have come with a Mastercard® debit card.
Your debit card can be used subject to it being active and enough funds being available at any UK retailer that accepts Mastercard, both on and offline. (Why might my card be declined?) It can also be used to withdraw cash from any UK Link cash machine.
Mastercard debit cards are also accepted by hundreds of thousands of retailers across the world, though please bear in mind that there may be fees for certain types of international transactions, charged by both ourselves and the country you are in.