STRUCTURAL FAILURE was identified as the likely cause of the partial collapse of a central London building on Tuesday afternoon. As NCE went to press one person remained trapped in the building near to ICE's Westminster HQ. The building had been undergoing refurbishment for some time. The London Fire Service conrmed that the top two oors of the five-storey building had collapsed and that structural failure is thought to be the cause. There was no evidence to suggest an explosion, the Fire Service added. But Association of Consultancy & Engineering chief executive Nelson Ogunshakin said that it was more likely that contractors working on the building had hit a gas main and caused an explosion.