asked the Minister for the Civil Service what changes have been made in the security arrangements required for recruitment to the non-industrial civil service since 1964.

As announced by my right hon. Friend the then Financial Secretary to the Treasury on 28 June 1968, the Government decided that, in considering persons not of United Kingdom origin for emploment on classified work in the Government service, length of residence in the United Kingdom would be taken into account in assessing the degree to which the persons had assimilated themselves in this country.—[Vol. 767, c. 148.]