"The surge in support for the #GreenParty is preventing #Labour from benefiting through holding on to seats in which #ReformUK is the chief challenger. The Green Party is currently predicted to win 74 seats; 68 of its gains would come from Labour. In addition, the Greens have reduced Labour's vote in hundreds of constituencies in which Reform is the governing party's chief challenger. Thus, 222 of the 266 seats that Reform expects to capture come from Labour."
https://www.electoralcalculus.co.uk/blogs/ec_rrose_20260403.html