Business Design Centre (originally the Royal Agricultural Hall), Islington, London: detail of the roof structure in the central hall, showing the decorative ironwork

NOTES: Originally designed as a base for the Smithfield Show, the Royal Agricultural Hall was converted into a trade and exhibition centre by the Renton Howard Wood Levin Partnership in 1984-1986. The wrought iron roof spans 123 feet, with ironwork by Andrew Handyside & Co of Derby. See RIBA118081 for a black and white version of this image.