OP, have you used your card to buy bitcoin on Binance before? If not, then here is the guide, but if you have and it is not working again, kindly note that recently, some UK banks have put restrictions on users interacting with a crypto exchange, and that may be the cause of the issue.
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In the past week, two of the countrys biggest banksNationwide and HSBCcracked down by applying daily limits for buyers or restricting credit cards from making crypto purchases