Re the boundary with UU behind the north stand:
Here's the published plan from the stadium documents: file:///C:/Downloads/8.%20BMD01-PLA-L1-00-DR-L-4002_BoundaryTreatments.pdf
As you can see, there's a tree lined section at the north-east section of the boundary but then a security fence is all that's planned between the UU access road and the stadium (line S11a).
The concern for me is that a fence is all that will be available, as the distance between the stadium wall / entrance gates behind that stand looks to be about 8 metres in width (gauging that from the scale of the football pitch on that document). That's not much room and, therefore, we'll be left with something completely underwhelming rather than a nice bit of landscaping / tree-lined avenue over on that side of the stadium perimeter.
I do hope the club have got something more up its sleeve than a rubbish fence.