It’s not clear to me that they have the full buy-in of members and voters to remain in the EU that the Libdems do, although even the LDs have people who support Leave. 2/
Labour in its present form is not a party of Remain. Please believe that. 9/
Vote Labour if you have improbable amounts of hope that they will decide one way or the other about brexit.
Vote Greens if you don’t mind that they won’t be everywhere in your area.