The Centre's Global Garden exhibition complex roof design relates to a leaf form, with central spine and standing seam 'arteries' running off at angles.  This complexity, combined with the curved overall roof shape, resulted in constantly changing surface forms which could only be handled by a material as adaptable as copper.  The judges recognised this as a major, landmark building in its predominant Tyneside location and acknowledged its strong, organic form, expertly clad with a natural material, which will change gradually with the environment over the coming years.