I'm not sure what the path to electoral reform looks like. Starmer is hostile to the idea. Labour have had electoral reform in their manifesto before and happily ignored it when in power.
Perhaps a hung parliament will get us there. I don't know what the realistic vote for Electoral reform is. Maybe a Lab-Lib government does it but Libs have been steamrolled in a coalition before.
I'm almost a single issue voter for Electoral reform at this point.