These are very interesting, the slide-show moves too fast for me to read all the text so I will have look at it a few times more to digest it all. Perhaps you could re-post under 'Links' so we don't lose sight of it.
I have consciously avoided going to Day House Lane in the recent past as its painful to see the fields Richard Jefferies wrote about so eloquently now being destroyed. The valuable work being done by archaeological excavations will at least salvage something.
Day House Lane and Coate Stone Circle are just outside the western edge of the development - it was originally (?sneakily) proposed to extended both sides of Day House Lane, surrounding the Stone Circle.
This first plan was hugely objected too (ie SaveCoate) > this campaign seemed to save the landscape and heritage, but if fact was a bit of fast one from the developer, who then gained a huge tract of land whilst publicly 'saving coate' > i don't think they ever intended to build on that area, just chance it a bit, and put themselves in a stronger position for teh area they really wanted too build on.
Anyway - the archaeology and landscape form part of a whole, extending east from coate stone circle, across the slight dip, and up the other side to 'Commonhead' and the main excavation discussed.
Note that the contract archaeologists have left c. 6 weeks ago ! - what is shown in that video is all stuff they did not do before they 'finished'.
Kinda pisses me off, we you consider the vast piles of paper work, planning time, consultants fees, more paper work, site inspections, paperwork and so on...
...and yet basic field investigation seems to have fallen down somewhat