Strange wall at Stoneleigh ,What on Earth was it for?

This wall and the nearby foundations are located at SP 334 717(approx) They are between the ex WW2 Stoneleigh military Hospital (now a business village)and a Footpath to the village of Stareton.

Resembling a short firing wall with windows with window openings.! one side is on the edge of a bank a faces the River Avon.
Probably it is associated with the nearby Stoneleigh Military Hospital (My dad was there with meningitis after national service in Palestine.) Later it became the Massey Ferguson (Of tractor fame) training school. I suspect but don't know that it might also have been a barracks.

Steve Carvell in Twentieth Century Defences in Warwickshire ISBN 978 07524 4268 6 provides the information that at SP 343 714 there was a HAAA battery(destroyed) and at SP 343 718 there was a German Working company at camp no 667/667a

Both these are quite close to the remains and perhaps may be relevant?

The location matches the sewage farm for the camp in the Deer Park.

The row of walls may well be the separating walls for the row of settling tanks.

The attachment includes small extracts of maps taken from:
www.old-maps.co.uk/#/

Original maps copyright of Ordnance Survey.

The sewage works are still there and i think it may be my map referencing that is inaccurate. the structures are in the wooded area to the right of the bridle path and approximately half way between the P in park and the B in Barracks on the map attachment..The "foundations may correspond with the building shown on the map and be agricultural such as a hen house but it is peculiar how close the support for floorboards are if that is what they are?

These are some of the original "barracks "buildings still in use .

Another interesting find. The wall is marked on the second map in the pdf that Ian linked. This appears to be a 1960s 1:2500 OS map and the position is 433427, 271548
Strangely, given that it's still there, it is omitted from the 1980's onwards even on the 1:500 mapping

Could there be a possibility of it being part of an obstacle course?or some other "training "equipment?