BAE jetstream and 146/RJ

[Vostok]

Apparently there made by two different companies according to the commonality... 

[11Air]

If I remember right BAE was absorbed by the new BAC along with Hunting which had already absorbed de Havallind.
Game wise most of the early UK aircraft need to change their manufacturer as the various take-over dates roll over. It's why we can no longer keep many historic aircraft airborne as 'rights' to the design data and engineering expertise is in the ownership of new companies and boards no longer interested in non-profit restorations.
I'm happy to research that for Team Sami if he has the time to incorporate it into the game.

11Air

[Vostok]

Well yeh you are right, all the BAC and British aerospace aircraft should all be under BAE systems by the 90's I should think. like the RJ's, ATP and jetstream.