Back in the day, UK debit cards were issued on distinct networks from credit cards - eg: Switch, Solo, and Maestro. Those cards weren't necessarily accepted in all the same places as credit cards, particularly internationally.
But over the past 10 years or so, those debit card networks have been phased out in the UK and almost universally replaced with Visa and Mastercard debit cards. As far as acceptance goes, these are pretty much 100% identical to using credit cards on those same networks.
But over the past 10 years or so, those debit card networks have been phased out in the UK and almost universally replaced with Visa and Mastercard debit cards. As far as acceptance goes, these are pretty much 100% identical to using credit cards on those same networks.