On the other hand, once work had commenced, it became clear that security was an enormous issue, with the new windows broken weekly by bored kids, and the contractor’s tools targeted by burglars entering across the rooftops of neighbouring buildings. This concern led to two architectural inventions- the galvanised steel unclimbable origami walls, and the razor wire climbing frame for creepers. A late discovery was that the cooling plant, when it eventually arrived from Wuhan, well towards the end of the contract, was considerably larger than what had been signed off on. Rather than being mounted on the walls of the side-space. it was placed above the heating plant in a steel and timber structure which is oblique in both elevation and cross section in order to accommodate itself to the already constructed security enclosure. The last external element designed was for the louvres which allow the air to flow but keep out the driving rain.