The Treasury may, if they think fit, during the continuance of the present war and a period of twelve months thereafter, issue any securities which they have power to issue for the purpose of raising any money or any loan with a condition that neither the capital nor the interest thereof shall be liable to any taxation, present or future, so long as it is shown in manner directed by the Treasury that the securities are in the beneficial ownership of persons who are neither domiciled nor ordinarily resident in the United Kingdom, and securities issued with such a condition shall be exempt accordingly.