Aeralis goes into administration, ending modular jet ambitions

With scale models being the closest that Aeralis had come to delivering its modular jet trainer concept, the UK company announced in May 2026 that it had gone into administration. (Janes/Gareth Jennings)

Aeralis Ltd has gone into administration, effectively ending the company's long-standing effort to develop and sell its modular fast jet concept to the UK and wider military market.

The board of the UK company announced on 16 May 2026 that it had appointed administrators, following what it described as a sustained period of financial pressure due to delays to the UK's defence spending plans and wider geo-political issues.

“The appointment follows a sustained period of pressure on the Company's cashflow as a result of continued delays to the UK Defence Investment Plan [DIP], combined with geopolitical factors affecting sources of funding,” Aeralis said.

Incorporated in 2015 as Dart Jet Ltd, Aeralis launched its modular fast jet concept in late 2018. At that time, the company noted its aim of offering to the market in the early 2020s a basic and advanced jet trainer aircraft that shared airframe, cockpit, and engine systems. Retaining these shared elements, the Aerialis jet featured outer wings that could be interchanged between a straight or swept edge depending on the requirement, while the engine bay could be configured for single or twin powerplant(s). A further concept aircraft, Aeralis-X, was to be developed to take advantage of other possible applications of the aircraft, such as aggressor, aerobatic, or ground attack roles. An unmanned version was also touted.