Spreadsheet of votes cast for each party in the 2019 and 2024 UK general elections, sorted by percentage change. Only Brexit/ReformUK, the Greens, Plaid Cymru, and Sinn Fein (in that order) increased their vote.
https://media.mastodon.scot/media_attachments/files/112/734/098/155/535/840/original/1aecb9fa5678b666.png