I have changed the name back to "Manydown". Having looked on the latest imagery(Esri World Imagery), there are signs of cable/pipe laying and site preparation.
The web page https://manydownlife.co.uk/wp-content/uploads/2022/03/Manydown_TimelineMapAmended.pdf 
has a timeline of when construction will occur at Manydown, it shows that the next stage will be house building, following construction of access routes and utilities.
I would think that landuse=construction would be a better tag than landuse=farmland for now as it is no longer farmland. 
Conifermapper