In 1851, prior to the establishment of responsible self-government, Flood was elected to the semi-elected Legislative Council. He represented the
electorate of North-Eastern Boroughs until the granting of responsible self-government in 1856. At the
first election under the new constitution he was elected to the Legislative Assembly as the member for
the same seat. At the next election in
1858 he transferred to the two-member Sydney seat of
Cumberland (South Riding). This seat was subsequently renamed
Canterbury at the
1859 election and Flood retained it until he resigned in January 1860 apparently after a heated dispute with the Premier,
William Forster. He subsequently re-entered the Assembly after winning the seat of
Central Cumberland at the
1869–70 election. He did not willingly contest the
1872 election although he was nominated for the electorate of
Newtown. In 1879 he accepted a life appointment to the Legislative Council, which he retained until his death. Flood was politically radical and opposed the re-introduction of transportation and the autocratic powers of the Governors prior to the granting of responsible government. He was socially conservative and had a reputation of being a tough businessman who objected to the level of wages demanded by labourers in the colony. His support of Protestantism alienated many in the colony's large Irish community. ==Government==