Why? While Green parties across the UK may be separate entities, I really don't understand why there should be separate threads. There may be some minor policy differences but I think the overall aims are largely the same. We don't have separate threads for Scottish Labour, Libdems or Conservatives, do we? You're essentially excluding people from the discussion if they don't live in England or Wales and that seems rather silly to me.
Scottish Labour and Labour in England are the same political party. The Scottish Greens, the Green Party of England and Wales, and the Green Party of Northern Ireland are three separate political parties, at times with different political views. Lumping the three of them together would be like saying the SDLP (from Northern Ireland) and Labour (from GB) are the same party. They're not, in the legal sense. They also have different political views, though they both have a similar political vibe.
In particular, those who think that they can fund their interesting green policies without economic growth are living in an economic fantasy world.
Unfortunately, every UK party denies physical reality in some of its manifesto, as well as denying unpleasant realities in the economic or the realm of other social constructs*. This unfortunately does mean we have to vote for whichever party or candidate we believe is most likely to bring the country more in line with how we think it should be, even if that party lives in a fantasy world, because literally every single one does.
*by social constructs I mean social systems that exist because we as a society have decided to agree they exist. The economy is obviously one of these. This isn't meant to detract from their importance, and in my view it doesn't.
I don't deny it at all. I'd go as far as to call a very significant proportion of landlords as bastards

- but this isn't the solution. The only palatable solution is build build build. It's that or depopulation by some means and I can't think of one.
The Scottish Private Residential Tenancy removed the option of a no-fault eviction, and I think that part worked as intended, even if the rent controls themselves did not.
To be honest, I think the solution is to expand social/council housing - I am increasingly convinced the vast majority of private rental sector is in fact a scam, and people should have the option to opt out of it in the form of social housing with a waitlist of no more than 1 year ideally.