From an energy point of view such buildings were highly inefficient. They also tended to limit the opportunity for inno - vative or creative working since each person had a set position and corporate groups tended to function within silos. Another problem was the large amount of space per person and the large percentage of circulation area. Questions of social value and workplace quality rarely challenged the strict management ethos. The challenge today is to adapt these buildings to suit new management practices, the new consensus on innovative and home working, and the demands of energy efficiency. The latter is driven by both the need for legislative compliance and the company’s own environmental targets.