Sorry you got the worst case scenario I mentioned above.

Since transfers are quite a significant percentage of Brussels Airlines' pax traffic, I think they and Brussels Airport should seriously review their operation with regard to making it more user friendly.

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.

Reminds me of Helsinki once, connecting from London to a Finnish domestic flight, with a quite reasonable connection. Notable departure delay from Heathrow (of course), plus a significant VOR hold approaching Helsinki due to congestion, put us on the ground there quite late, and unusually an arrival onto a remote stand. Wait to fill the bus, drive across to the non-Schengen gates, queue for immigration, then the long trek down the corridor between international and domestic, back through security, sprint down to the furthest gate, which turned out to be a bus again, off round the ramp, to the very next remote stand to the incoming London aircraft, which of course was still there. I could have crossed from one to the other in about 20 seconds.

I once flew from Rome to Manchester via Heathrow on BA.

Having disembarked at Heathrow we went around the system only to end upon the same plane, with the same pilots (I noticed because both flights had an all female cockpit crew and I remembered the names), although the cabin crew was different.