Parliamentary candidates not picked to fight "winnable seats" in areas with less tolerance

The study found a "systematic and quantifiable pattern" of political parties officers opting against fielding minority candidates where they perceive that their non-white appearance might prevent a win. This includes constituencies already held by the party, and those within reach, requiring just a small swing in the vote to change hands.

source https://phys.org/news/2021-01-parliamentary-candidates-winnable-seats-areas.html