HC Deb 21 October 1968 vol 770 c221W
Dr. John Dunwoody

asked the Postmaster-General whether mail posted overseas addressed to the United Kingdom is dealt with as first- or second-class mail on arrival in Great Britain.

Mr. Stonehouse

Incoming international mail receives first-class service in this country unless it is readily identifiable as proper for second-class treatment—for example, individual lightweight printed matter items and bulk posted printed matter received by surface route. In particular, all air mail correspondence, including air mail printed matter, is treated as first-class mail.