Very nice Tim.
Reasonably sure. The fundamental design features are right, including the manure pit and the vents beneath the window (replaced in Tim's shot but see link below).
The location is indeed akward. However, although the goods shed is at some distance, the yard itself is just across the tracks via the barrow crossing. Significantly, the exchange sidings behind the stables may well have needed horse shunting (access beneath the footbridge?), and the creamery may have had some deal with the GWR. All of which would mean the stable block was centrally located.
This photo on Warwickshire Railways - thanks Stephen - shows the stable block alledgedly in the 1930s:
(note unusual way of applying two-tone livery to the door by the way, I wonder if the creamery had taken over the structure by this point).
There is also a nice overview shot here: https://www.warwickshirerailways.com/gwr/gwrmm982.htm
An alternative explanation is that this stable block was built specifically to serve the exchange sidings or creamery, with another couple of stalls located separately in the main yard. The old tramway terminus where the yard was built had stables in this building: https://www.warwickshirerailways.com/gwr/gwrmm978.htm