UK content of about 40–50%. The A350 XWB has so far achieved 564 firm orders and has its wings developed in Filton and assembled in Broughton. Rolls-Royce is currently the only engine supplier to the A350 XWB with the Trent XWB. Hawker 800XP, the Airbus plant in Broughton builds the fuselage and wings for the Hawker 800XP variant. This work employs about 450 people at the plant in North Wales. Bombardier Aerospace facilities in Northern Ireland play an important role in nearly every Bombardier aircraft programme. The most notable are the production of the fuselage for the Learjet 40 and Learjet 45, the production of the centre fuselage for the Challenger 300 and other programmes. For the newly proposed C-Series, Belfast is planned to design and produce the wings, rear fuselage and nacelles. SonicStar is a proposed supersonic passenger airliner designed by HyperMach. Its first flight is planned for 2021. Crewed military aircraft Eurofighter Typhoon, the British aerospace industry has a 37.5% share in the production of the Eurofighter Typhoon and a 33% share in the development of the aircraft. The main participants are BAE Systems and Rolls-Royce. The UK had 40,000 jobs involved in the construction of the Eurofighter Typhoon, across 400 suppliers. Comparatively, the next largest contributor to the Eurofighter Typhoon, Germany, had 25,000 jobs involved and 400 suppliers. BAE Hawk is one of the best-selling advanced jet trainers in the world and has generated billions of pounds in exports for the British aerospace industry. BAE Systems and Rolls-Royce are the two main participants and, so far, over 900 Hawks have been sold worldwide. The latest variant is the "AJT" version, or "Advanced Jet Trainer". F-35 Lightning II, the UK aerospace industry has a workshare of about 20% in the aircraft and has two companies in "Team JSF", BAE Systems and Rolls-Royce. BAE Systems designed and produces the aft fuselage, fuel system, horizontal and vertical stabilizers among other things. Rolls-Royce provides the Liftfan for all F35Bs. Airbus A400M has a workshare roughly equivalent to its share of procurement, which equates to about 14%. Due to traditional Airbus roles, Airbus UK developed the wings for the A400M and outsourced some of the manufacturing; however, the final assembly takes place in Filton. Saab JAS 39 Gripen, over 30% of the content within Gripen is manufactured in the UK, according to Saab. The carrier-based concept, the "Sea Gripen", was also designed