SNP MP Mhairi Black is stepping down at the next general election. Ms Black, the party’s deputy leader at Westminster, became the youngest MP in more than 300 years when she was elected aged 20 in 2015. Her maiden speech was viewed online more than 10 million times within a week. She is the sixth SNP MP to announce they will not contest the next election, which is expected to be held in 2024. In a statement Ms Black, 28, described Westminster as an "outdated, sexist and toxic" working environment. In 2018, she made headlines after detailing some of the abuse she received during a parliamentary debate on misogyny to mark International Women’s Day.