[1/5] A concept model of the Global Combat Air Programme (GCAP)'s fighter jet is displayed at the DSEI Japan defense show at Makuhari Messe in Chiba, east of Tokyo, Japan March 15, 2023. REUTERS/Kim Kyung-HoonTOKYO, March 15 (Reuters) - Britain and Japan are set to dominate a three-nation project with Italy to build an advanced jet fighter, with Rome set to pay around only a fifth of the overall development cost, two sources said. "The cost of the project will likely be around 40% each for Japan and Britain," one of the people with knowledge of discussions told Reuters. Japan's defence ministry said that discussions were ongoing and declined to comment on the cost sharing ratios. Details of which companies will build what components are being hammered out in regular talks between more junior government officials and contractors in Britain, Japan and Italy, the sources said.

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