80% of Constituency Labour Parties backed the PR resolution at the September 2021 Labour Conference.
It was defeated.
The majority of affiliates (mainly trades unions - but others too) voted against.
There was no support from the party leadership, despite Starmer's pledge during the leadership election campaign. Another of his broken promises!
https://labourlist.org/2021/09/confe...epresentation/
Most recent YouGov polling shows 42% public support for PR (up to 62% among Labour voters). That is without any recent noticeable national campaign to make the case.