It's been a bit of a thing on the left to militate for the voting age to be reduced to 16. It was in Corbyn's ill-fated 2019 manifesto. Without doubt, they assume the 16-18 cohort would be a big boost to their vote.
Really? There's a thoughtful essay here by Aaron Bastani - the epitome of a thoughtful leftie, though some of his many thoughts are daft - in which he notes that this is by no means a given.
No, Younger People Aren’t Always More Progressive - just look at Brazil and Israel ... There is no reason reactionary politics can’t flourish this century given the multitude of challenges humanity faces.
His thesis is indeed firmly centered on Brazil and Israel, which is convenient for someone whose readership probably prefers to think of UK youth as inherently progressive. But he could have found evidence for what he's saying in many a European country, including hereabouts.
In fact, surely what's most likely is that 16-18 votes will go to whatever demagogue comes up with a catchy viral theme, be that "Oh, Jeremy Corbyn!" or something confected on behalf of the likes of a media-savvy Trump etc etc. And timing will be everything: it'll be whatever sweeps the www at just the right moment. There's no telling what you'll get, and whether it would be Right or Left (by classical taxonomy) - but it could be ghastly.
As it happens, I can't see ultra-cautious Starmer including this in his next manifesto - though he'll most probably have coalition issues to think about, and you know the Greens and LibDems will want it. They should be careful what they wish for.