A seat in the House of Lords is up for grabs, with 27 hereditary peers vying to join or, in several cases, re-join the Upper House.
The result of the “by-election”, triggered by the death of Lord Lyell, will be announced later on Monday.
Among the candidates are relatives of ex-premiers Harold Macmillan and David Lloyd George and Lord Harlech, who at 30 would be among the youngest peers.
All peers currently sitting in the Lords were entitled to vote.
The result was due to have been announced last Wednesday but was postponed following the fatal stabbing of a police officer in Parliament.
Lord Lyell was one of the 92 hereditary peers who remained in the Lords in 1999 after the remainder were expelled in reforms carried out by the government of Tony Blair.
Under current conventions, when a hereditary peer dies, a by-election is held to elect a successor. This election was open to all those with hereditary titles on the register kept by the Clerk of the Parliaments.
The 27 contenders were asked to make the case for themselves in a series of short statements and potted biographies, in which they was also asked to indicate their political allegiances.
Among the best-known candidates are Earl Stockton, the grandson of Harold Macmillan – Conservative prime minister between 1957 and 1963. Another famous political family is represented in the form of Earl Lloyd-George of Dwfor, the great grandson of the former Liberal prime minister David Lloyd George.
Other contenders include Lord Harlech, the 30-year old grandson of David Ormsby-Gore, the former Conservative politician and British Ambassador to the United States in the 1960s, who had a close friendship with Jackie Kennedy.
Also standing are experts in urban regeneration, farming, housing, financial services, architecture, the bio economy, retail and horticulture.