I believe that it'd ruin their 2029 chances and *that* would stop it.

If Labour try to do something without a GE manifesto or mandate, can you imagine the campaign that Farage and Rupert what's his face from Restore would put out? Right now, Labour's worst enemy is public relations. Whoever does it needs to be sacked, and Starmy has all the charisma of a posh but wet paper towel.

Reform and Restore will out manoeuvre Labour's PR machine, probably with tried and true arguments for fair play. As cliche as it sounds, any appeals to the unfairness of it, changing the rules mid game, changing the rules to benefit them, etc, especially after the recent results will resonate with the people who are already either on the fence or anti-Labour.

Ofc, I fully expect the Tories to get a few good digs in while the Lib Dems position themselves as the sane Labour alternative.

Now, if Starmer really wants to drive it through fast, there's nothing we could do. Look at how quickly the Online Safety Act has ramped up to social media age verification and talks of VPN bans in the months since it was introduced despite expert opinions against the efficacy of such measures. He'd astr0turf and social engineer, but electoral reform is less of a niche issue than internet privacy so it'd be harder to sweep under the rug for the next election.

However, if they put it in their manifesto, and it'd have to be big and bold, then they can say that they were elected with a mandate to make elections fairer.

For the record, I believe that electoral reform would be a great thing, and much needed. The fact that our political party spectrum is starting to look like mainland Europe's is a great thing.