I am making a guess at this because I have come across a similar thing in Yorkshire. Have a look at this map, towards the eastern side, around grid ref 3472. The map dates from pre-1930 with provisional revision up to 1950 (see bottom margin).
https://maps.nls.uk/view/189236478On this style of OS revision new buildings were added as hollow, unshaded blocks. There is a large area of these, which suggests some kind of military camp, set out in Stoneleigh Park.
The two examples I have looked at were smaller than this. They were apparently used to accomodate army personnel who were manning scattered AA gun emplacements surrounding an industrial area so this one may relate to the Coventry/Birmingham area. Perhaps it was a main centre for AA admin. and included workshops.
After the war they were abandoned, and people who had been made homeless during the war just moved in. The local authorities had no accomodation in which to re-house them, so they were used for some years. In one case I have seen documents showing that an urban district council managed the accomodation as council housing for ten years until they had some alternative to offer.
