This successful test of a hydrogen-fuelled gas turbine engine is part of a project that leverages ArianeGroup’s decades-long experience with hydrogen propulsion for the Ariane rocket.

Aviation CTOs say flying now uses 80 per cent less fuel per revenue passenger km than it did 50 years ago, but more must be done. They have released their companies' plans on future sustainability efforts.

Textron is suspending its latest Cessna Citation programme, the Hemisphere. The company blames a failure by Safran Aircraft Engines to fix problems with the Silvercrest turbofan.