What is the maximum range of a BAe 146-300? Can auxiliary fuel tanks be added? What is the maximum range of a BAe 146-300? I saw one on Flightradar24.com which started in western France and is still flying non-stop to Greece (flight in progress at the time of posting).

I was really surprised, I guess they probably have an additional fuel tank? I know that some airlines do add extra tanks  to their planes (e.g. on a B737) to increase the maximum range; but is it possible on on a BAe 146-300?
According to wikipedia it has a range of 2909 km and the distance is around 2500 km