Thanks Colin, that's what I thought at first, but the scarred structure appears to be on the paved island in the middle. Notice the inner ring-road goes right around the paved area, with all buildings on the outside [see the architect's drawing]. Also, the structure was built over the paving, suggesting a later addition?
Maybe they added another block inside after the main perimeter housing was complete?
Just thought it was a bit of an oddity. Perhaps someone on here will know the answer?