On 7 May 1975, the British Prime Minister, Harold Wilson, spoke at a press conference in Washington, D.C. He replied to press reports regarding the “Doomed Britain” remark.
It is, perhaps, worth noting that this minor issue seemed important enough at the time but was very quickly lost to common memory.
Posted to YouTube on 23 Jul 2015 by AP Archive: SYND 8 5 75 BRITISH PRIME MINISTER, HAROLD WILSON, AT PRESS CONFERENCE IN WASHINGTON