Engineers: Ove Arup. This pavilion featured some Charles Rennie Mackintosh features on loan - most notably, his cupola/lantern with finial from Pettigrew & Stephens department store, Sauchiehall Street. This now resides in the sculpture garden of the Hunterian Gallery, Glasgow. (The same sculpture garden also contains Eduardo Paolizzi's 'Rio', when not on loan elsewhere.)
The Mackintosh roof trusses displayed in the face of the pavilion building were borrowed from the property at 233 St Vincent Street, and later reinstalled there (image and more information here).