The 1830 Act extended the borough's boundaries to encompass the Wapentake of Bassetlaw (which included the whole of the northern end of Nottinghamshire, including the town of Worksop). All those within this area who were qualified to vote in the county elections were given votes for East Retford. Within a year, Parliament was debating the Great Reform Bill, but the extended boundaries meant Retford could retain its seats until in 1885 the Municipal Borough of East Retford was reformed and the constituency replaced by an identically delineated single-member county constituency - Bassetlaw.