Fergie, the list Alpha one provide is completely accurate! A/C based in Belfast which s'air handle include 1xTCX 320, 1xTOM 320 and 2xLS 737's. Down on last years based a/c due to less demand (credit crunch), LS had 757 and TCX had 2x 320's. 757 will prob return when things look up hopefully!
UPS and TNT have daystoppers and one of LS 737's is converted to freight for Royal mail at night. The others on the list are not BFS based but they do make regular appearances, some might depend on season