Agreed. I mapped out the rest of the estate using OS Open USRN. It's wildly inaccurate to the real layout as far as I can tell but once aerial imagery is updated with the construction site (ideally with the roads being clearly delineated) then this can be updated https://www.openstreetmap.org/changeset/159383096

The cycle path is quite short and I think it just runs past the estate if memory serves me well up to Marchant Grove and the highway depot.