It's amazing how much everything has changed in 10 years. I regard myself as a centrist too, I voted for Cameron and May but I didn't vote for Boris where I voted Lib Dem. Indeed Starmer will get my vote, not so much on policy but rather because the Tories need to be given a huge kicking. I always thought that Sunak would be a reformer but even with a huge majority he seems powerless and totally out of touch.
At the moment we desperately need someone like Blair albeit without the wars. Starmer has understood that sentiment and that's why he'll win, it's why he has purged the more extreme left. Labour are now the only palatable party for the working and middle classes which is basically everyone.