I think Curtice underestimates how much people want the Tories out, to be honest. I think we’ll see high levels of tactical voting among people who want the Tories out, which is nearly everyone, and that will drive higher turnout.

EDIT: Just saw this, lot of it about in this thread:

“If Starmer wants to win a general election, then he’s going to have to compromise and do things that I might not like to appeal to a broader cross-section of voters. Now, that might lead to improvements in the lives of the majority of people and remove the worst government in living memory, but is that worth me having to put up with him not doing everything that I specifically want him [sic] from a Labour government? Not really.”