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External Data Source

Source

Regular Expression
^(GIR\\s{0,1}0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\\s{0,1}[0-9][ABD-HJLNP-UW-Z]{2})$