I heard somewhere that Britain will give these to greece after a while. Does anyone know exactly what I need to do to make the event fire?
In the most recent version of the game the event will never actually fire if the UK is AI. The requirements are for the UK to have nationalism and imperialism and to not be at war, so you could switch to the UK and fire it for them and then switch back, once the UK has nationalism and imperialism (which can be surprisingly late in the game).