Singapore, Paris, Zurich and Indianapolis centres maintain Tier 1 status, phasing out single use plastics and with motion-sensor lighting, energy-efficient appliances and plumbing, and the Valencia centre achieves Tier 2.

The Falcon 8X is Heron’s first ultra-long range aircraft; it can fly non-stop for around 13 hours, easily reaching popular destinations around the world from its base in Europe.

The engine will be put through its paces over coming months in a flight test programme that includes engine performance and handling checks, inflight relights, tests of the nacelle’s anti-icing system and fan vibration.