[3] Its members are involved in trade unionism, as well as campaigning "around housing, Palestine solidarity, migrant rights, trans liberation and many other issues.

[13] rs21 members supported his campaign in the subsequent 2017 general secretary election, with Allinson ultimately coming in third place with 17,143 votes (13.2%).

[1][19] In 2024, rs21 renewed its ‘About Us’ page after a democratic process culminated in an All Members Assembly, calling it "a living document" that "reflects the organisation's commitment to a non-reductionist class politics that opposes all forms of oppression.

"[20] rs21 maintains a website of news and analysis, and publishes political pamphlets on topics including Palestine, eco-socialism, and trans liberation.

Members of rs21 also publish Red Bird, a bulletin aimed at "the radical ecological and climate justice movement".