To remove my confusion again, I am summarising the posts above on the Bidston Court Site:
Referring to chriskay's map:
Bidston Court Gardens is the original location of the house moved to Hill Bark. There were originally two entrances to the site, the main entrance was by the Gate House which is now a private residence, the original gates from here were donated to Calderstones Park in Liverpool.
The present entrance is through the gates which led to the stables and coach house. (There was a third entrance by way of the building on Upton Road, but this was by a steep, narrow path.)
The path from the gate can be seen to the right of the arch (which leads to the house). When the house was removed, the stables remained until the second world war, when they were destroyed by a bomb.
The foundations and floors of much of this block still remain.
There are no signs that there was ever a building at the site of the main building, most of the site is now covered with trees
The semi-circular wall seen on the aerial view isn't seen on chriskay's map (I've marked its location on the map) nor on a later 1917 map that I have, so it could well have been added as part of the landscapping of the site after removal of the house.
The buiding on Upton Road was obviosly originally built as part of the estate, as there is a path from it to the house marked on the map, but I think it is unlikely to be a second coach house.
As the site is on the escarpment, the grounds are steep, and the formal gardens are in terraces
In the picture above, the house was behind the line of trees.