looksBritishfunction

Whether an address is surely British, with no hint: it ends with the United Kingdom or one of its nations (or Jersey, Guernsey or the Isle of Man), or it holds a full postcode in Royal Mail's grammar whose area Royal Mail uses, or BFPO and a number. A Canadian postal code never passes: it ends in a digit (M5V 1A1), a British postcode in two letters (W1A 0AX).

import { looksBritish } from "@johnmorrisdotca/address-plus/gb";

function looksBritish(text: string): boolean

import { looksBritish } from "@johnmorrisdotca/address-plus/gb";

console.log([looksBritish("10 Downing Street, London SW1A 2AA"), looksBritish("100 Queen St W, Toronto, ON M5H 2N2")]);
// → [true,false]

[ true, false ]