By the same logic, any Leonardo project that has any British engineers involved working inside Leonardo would also automatically go to the British tree too?
Its an incredibly strange logic. Italy doesnt operate the AW159, didnt test or evaluate it or even consider it for its armed forces. They were all built in the UK and are a development of the future Lynx project.
To use the nationality of staff who worked on a project from a company or where that international company is headquartered as the basis to add something to a tree, despite that tree never even looking at operating the helicopter from its main nation or any of its sub trees is a path we dont wish to take.
Otherwise anything with BAE, Lockheed or Boeing involvement (most modern equipment) suddenly becomes viable for the US or British tree.