The phrase "to elect some peers" means to choose or select a few people to become members of a group or organization with similar social status or qualifications. Full definition
In his speech opening the debate on the Lords reform bill, he hinted that the election of the second and third tranche of elected peers, in 2020 and 2025, could be subject to a referendum. (theguardian.com)
Viscount Astor is among several senior peers voicing concerns about the government's proposals to introduce elected peers to the Lords by 2015. (politics.co.uk)
Under the Tory proposal to be put to Nick Clegg, the 92 hereditary peers would be replaced with elected peers. (politics.co.uk)