WHBM
At the risk of being guilty of "creeping" my own thread, I thought it was an Aer Lingus 1-11 that did the first jet job from LBA ? I wasn't born but I'm sure I heard my mum's neighbour from their old house years ago (gasp) say something along those lines. Evidently it was the noise that informed everyone. I'd forgotten BMA operated from LBA back then. They got properly established in 1980.
Aer Lingus, of course, used the highly original "Aer Lingus" c/s until about 1986. Then came "Shamrock". Beats me why they didn't think of that before.
Unfortunately, I've now got Court Line on the brain. Even had a dream about one of their TriStars last night. Dear oh dear.