LW is not a QC, but a special freighter.
LP, LR, LZ, LY and LA are the QC machines.
STN-EDI-STN
EDI-STN-EDI
BFS-EMA-BFS-EMA-BFS
EDI-EMA-EDI
EXT-EMA-EXT
NCL-STN-NCL
These as far as I remember are the routes flown by these and leased Islandsglug machines. Titan cover others with 737 SF, 737 QC, and 146 QT.