HC Deb 14 October 1968 vol 770 c27W
Mr. G. Campbell

asked the Chancellor of the Exchequer whether official envelopes, marked On Her Majesty's Service, are treated as first-class mail; and how other categories of official, unstamped letters are classified.

Mr. Taverne

Arrangements have been made with the Post Office for distinguishing Official Paid correspondence to be sent first class from that to be sent at the cheaper rate.