Article in The Guardian about a study by a polling group called More in Common.
"Leftwing activists in Britain are less likely to work with their political opponents than other groups and more likely to think those holding different views have been misled, a study has found."
"The research also shows the group is more likely to dislike and criticise those that disagree with them than other voting blocs"
https://www.theguardian.com/politics/2025/feb/19/leftwing-activists-less-likely-work-political-rivals-other-uk-groups-study
The study itself presents an even bleaker picture of the segment they call 'Progressive Activists'.
https://www.moreincommon.org.uk/our-work/research/progressive-activists/