Must have been some sort of tech issue like Johnny said.
LS717 G-CELP arrived LBA at 10:02 this morning,
LS717A G-CELZ departed LBA at 11:22 this morning.
1hr 20min, Not to bad moving the service (pax, crew) onto the spare aircraft
UPDATE: LS718 now airbourne to EDI, due in 2hr 25mins late.