Sir Harold "Hooky" Berners Walker, KCMG (born 19 October 1932) is a British former diplomat.
He served as British Ambassador to Bahrain (1979–81), the United Arab Emirates (1981–86), Ethiopia (1986-1990) and finally Iraq (1990–91).
From 1958 to 1962 he lived in Dubai, and subsequently served as British ambassador to Bahrain (1979–81), the United Arab Emirates (1981–86), Ethiopia (1986-1990) and finally Iraq (1990–91).
He is a member of Council for Arab-British Understanding (CABU), and a trustee of the Next Century Foundation.
In 2004, he re-entered the public eye as one of the signatories of the letter to Tony Blair from former British diplomats criticising his approach to foreign policy in the Middle East.