Do you really believe a new Labour government (especially) with large majority is going to become a 'continuity' government? To me what Labour is doing is beginning to look and sound like a government in waiting.
They will talk to anyone they need to talk too, whether it's to rebuild the economy or to make real changes to the lives of ordinary working people, by making lasting interventions in e.g. housing, with policy that will benefit those who now are struggling to find homes and those who are fearful they might be struggling to hold on their home in the future, and will ensure insulation and other energy management elements are included.
Once they have seen the books, then some emergency plans will be launched, probably around NHS/Social care and maybe education, simply to stop further implosion. Such plans won't be the be all and end all of the expectations, but the first steps. It is abundantly clear that to make a real movement on the dial, will take at least two terms in government, maybe even three.
Trying to put a price on what will be necessary in money terms and indeed on changes in legislation at this stage is foolish. The intentions Labour has already given, show a clear indication they know what the task ahead of them is likely to require, but they are also aware "that the devil is in the detail" and that has to be given some clear analysis once the full landscape requiring change is known and validated.
Even if the Tories get back, there will be no continuity government... or else we are all going to hell in a handcart