On flight tests carried out on 16 November, Rolls-Royce said its aircraft reached a top speed of 345.4 mph ( 555.9 km/h) over 1.8 miles (3 kilometres), exceeding the current record by 132 mph (213 k/h). It broke another record in a subsequent 9.3-mile (15 kilometres) flight, during which it reached 330 mph (532.1 km/h), surpassing the current record by 182 mph (292.8 km/h).

It smashed another record when it reached 9,842.5 feet (3,000 meters) in 202 seconds, beating the current record by 60 seconds.

This means that the aircraft is the world's fastest all-electric vehicle after reaching a maximum speed of 387.4 mph (623 km/h) during its flight tests.

The aircraft is powered by a 400kW electric powertrain and the most power-dense propulsion battery pack ever assembled in aerospace.

CEO Warren East claimed the result was a milestone toward 'jet zero' and decarbonising transport across air, land and sea.