I just booked a flight for a loved one, from PRG-BRU-MXP.

The flights are on SN Brussels Airlines, which I guess used to be called Sabena:

The aircraft types for the two segments are:
British Aerospace 146 Passenger
Avro RJ85 Avroliner

Should there be any cause for concern over safety of either these aircraft models, or this airline, or these airports?

I sincerely appreciate your thoughts, thanks.