All that stuff you want costs a lot of money that the treasury would have to front astronomical sums to implement.
Or private individuals.
Stone - one of the items on your Utopian Shopping List is ‘Passivhaus standards for new buildings’. By when? Legislation passed in the first 100 days? By the end of the Parliament? I assume this covers houses too? Do we currently have the knowledge/skills to implement this across the industry nationwide? What would this do to house prices/renting costs (which are already unaffordable for many)? Or would general taxation subsidise this for private buyers/renters?
Don’t get me wrong, building standards in the UK have been very poor, particularly houses. And the UK is way behind the curve with energy efficiency. But the industry is moving in the right direction.
I’ve picked up on one item on your list that I know something about. If Labour put that in their manifesto to update Building Regs to Passivhaus standards even by 2030 I’d piss myself knowing how unrealistic it was and would have to conclude the rest of the manifesto is equally pie in the sky. Which is what happened when Corbyn was in charge.
I’m sure the other items on your list could be equally dismantled or picked apart on further interrogation by someone with the knowledge and/or inclination (e.g. the right wing press). So Labour would get nowhere near Downing Street. That’s the most important first step to getting anything done.