The area you're looking at is where Qinetiq's Cody Site now stands.
Structures was originally meant for long term fatigue testing of a Concorde; there was one inside that tall square building. It was subjected to continual reversals of temperature via first being heated, then having chilled water circulated round it.
When this programme finally finished, the building was allocated as the National Space Centre but as far as I know was never used as such. It was demolished to make way for Cody Site in the late '90s/early noughties.