Under-Secretary of State for Dominion Affairs

The position of Under-Secretary of State for Dominion Affairs was a British ministerial position, subordinate to that of Secretary of State for Dominion Affairs, created in 1925 to deal with British relations with the Dominions – Canada, Australia, New Zealand, South Africa, Newfoundland, and the Irish Free State.

In 1947 the office was replaced by the Under-Secretary of State for Commonwealth Relations.

The post lasted as long as the office itself, from 1925 to 1947 with the last Permanent Under-Secretary of State for Dominion Affairs, Sir Eric Machtig, transferring in 1947 to become the Permanent Under-Secretary of State for Commonwealth Relations, jointly with A. Carter formerly of the India Office.

...
Wikipedia