Concept art of the British, Italian, Japanese Global Combat Air Programme (GCAP) next generation fighter jet. (Edgewing)

WASHINGTON — The tri-national partnership behind the sixth-generation Global Combat Air Programme (GCAP) has awarded a £4.6 billion ($6.1 billion) contract to fund the rest of the “concept and assessment phase” of the program and push ahead with “joint detailed design development.”

The 18-month contract, awarded by the GCAP Agency on July 3, formally goes to Edgewing, the consortium of developers for the project pursued by the UK, Italy and Japan. The new money follows an April contract for £686 million.

“This contract award marks another significant milestone for the programme, underlining the pace of progress and reinforcing GCAP as a flagship example of innovative defence collaboration,” an announcement from the GCAP Agency said. “Jointly funded by the three nations, the contract will drive the next phase of key design and engineering activity for the programme.”

GCAP is the lone sixth-generation fighter development program in the works in Europe, after a French-German-Spanish effort dubbed the Future Combat Air System fell apart last month.