No point yet announcing things that you may have to change or u-turn as the term is called.
And yet the shadow chancellor was on the radio today announcing that Labour won't be introducing any sort of wealth tax. And Starmer's been on TV to announce that he wants to use "partnerships" with the private sector to sort out NHS waiting lists.
So I guess announcing some things are okay. The rule seems to be that they can announce policies that could just as easily come from tories.