It's a about 10 years since I transited at Brussels but I used to do it quite a lot from NCL to HAM and NCL to ZRH. I have to say I missed several connections, both due to the tight transfer time, and also, being the first flight out of Newcastle to Brussels, the flight was often held on the ground due to ATC congestion with obvious consequences. Also, I remember arriving at a terminal from where you were bussed to the other side of the airport, to virtually return to the same terminal. Hopefully things have improved now, but it was all an issue with being Non-Schengen. Once, when it was clear that I would miss the connection to ZRH, I was met at the bottom of the aircraft steps and transferred in a van to another terminal to be the last remaining passenger on the connecting flight. But in those days Sabena and Swissair were in the same group, and of course both airlines have since disappeared, to be re-incarnated as something else.