Restricting list of billing addresses

Clash Royale CLAN TAG#URR8PPPRestricting list of billing addresses
Taking payment using StripeCheckout.configure() & handler.open with billingAddress set to true. I'm only going to be shipping product to UK & possible some EU addresses. Is it possible to restrict the list of countries in the country drop-down to a specific set? I can check country code in token : function(token, args){} but restricting the country set would make for a better user experience.
thanks.
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