thumb|Formation take-off of an RAF Tornado GR.1 and a Tornado F.2 prototype in September 1982 When the agreement was finalised, the United Kingdom and West Germany each had a 42.5% stake of the workload, with the remaining 15% going to Italy; this division of the production work was heavily influenced by international political bargaining.Haglund 1989, pp. 52, 56. The front fuselage and tail assembly was assigned to BAC (now BAE Systems) in the United Kingdom; the centre fuselage to MBB (now part of Airbus) in West Germany; and the wings to Aeritalia (now Leonardo) in Italy.Segell 1997, p. 125. Similarly, tri-national worksharing was used for engines and equipment. A separate multinational company, Turbo-Union, was formed in June 1970 to develop and build the RB199 engines for the aircraft, with ownership split 40% Rolls-Royce, 40% MTU, and 20% FIAT.Long, Wellington. "Swing-Wing Wonder Weapon Is Going Into Production." Ludington Daily News,24 August 1976.
thumb|Formation take-off of an RAF Tornado GR1 and a Tornado F2 prototype in September 1982 When the agreement was finalised the United Kingdom and West Germany each had a 425% stake of the workload with the remaining 15% going to Italy; this division of the production work was heavily influenced by international political bargainingHaglund 1989 pp 52 56 The front fuselage and tail assembly was assigned to BAC (now BAE Systems) in the United Kingdom; the centre fuselage to MBB (now part of Airbus) in West Germany; and the wings to Aeritalia (now Leonardo) in ItalySegell 1997 p 125 Similarly tri-national worksharing was used for engines and equipment A separate multinational company Turbo-Union was formed in June 1970 to develop and build the RB199 engines for the aircraft with ownership split 40% Rolls-Royce 40% MTU and 20% FIATLong Wellington "Swing-Wing Wonder Weapon Is Going Into Production" Ludington Daily News24 August 1976