Miles,
To my recollection Air Foyle is operating a fleet of 146-200/300, Sterling operates a bunch of ex. Air Contractors B727-200F's and a third airline is operating the A300's (ChanEx ?)
However, I seem to remember an article in Flight Intl. in which it is stated that TNT has plans to start their own airline.
Liege is, for lack of a better word, not a metropolis. But belgian beer is good ....