Overview

• Zarah Sultana and Jeremy Corbyn are co-leading an unnamed left-wing party that has yet to publish a formal manifesto or set a launch date.
• National polls from Find Out Now and YouGov place the party’s support between 15% and 18%.
• One in three voters aged 18–29 say they would back the new movement, outpacing Labour among young adults.
• Corbyn-era allies John McDonnell and Diane Abbott have opted not to join, highlighting fractures on the left.
• Experts warn that first-past-the-post electoral rules could limit its parliamentary seats to as few as five to seven.