I'd care to resurrect this thread as I've just been looking in to this (for the second time). Originally I was confused by the "Hillfield Farm in Hall Green" label, knowing full well that Hillfield was the name of the area between Solihull town centre and Monkspath.
Looking at the second pair of photographs posted by Vivienne14 (the ones without the little girl) they are clearly labeled as "Highfield Farm" - demolished in 1920.
Now, Highfield House (which was demolished in 2012) was said to be the farmhouse to Highfield Farm. But I've searched the maps of the area and there is not a Highfield Farm. However, there is a farm named Hillclose Farm just across the road from Highfield House. I have looked at three maps from 1890, 1905 & 1916 and they all show Highfield House and Hillclose Farm. I believe that the photographs posted are of Hillclose Farm, even the footprint of the main building bears a close resemblance to that on the map.
I think that whoever labeled the first photograph (the one with the little girl) got confused with HILLclose Farm on highFIELD Road and the error has remained with the photograph. This is in spite of the fact that the other two photographs clearly say HIGHFIELD! Or, maybe, the OS made a mistake with the name of the farm and it got carried over from one map to another.
I dare say those responsible at the time will not be around to ask!!
I've attached the three maps.

Highfield House & Hillclose Farm - Hall Green - map c1890

Highfield House & Hillclose Farm - Hall Green - map c1905

Highfield House & Hillclose Farm - Hall Green - map c1916