Hughes resigned as councillor in March 1961, as he felt that 'he could not guarantee to be a fully effective member' of the body following his appointment to the
House of Lords. In
Harold Wilson's
first government, he served under
Scottish Secretary Willie Ross as
Under-Secretary of State for Scotland from 1964 to 1969, and then as
Minister of State for Scotland from 1969 to 1970 and again from 1974 to 1975. He was made a
Privy Councillor in 1970. His obituary in
The Herald noted he 'played a key role in persuading the government to proceed with the
Tay Road Bridge, at the time the longest road bridge in Europe'. Hughes chaired both the
Glenrothes and
East Kilbride development corporations, and was also chairman of a royal commission on reforming Scottish legal services. After leaving ministerial office he remained an active peer and was noted for his attacks on the
Thatcher and
Major governments, on issues such as the introduction of the
Poll Tax in Scotland, and Conservative claims about the possible economic impact of
Scottish home rule. ==Personal life and death==