Mate got airborne on a Daventry departure dispatched by shuttle and realised they didn’t know where they were going (we carried plogs for Glasgow and Edinburgh at that time although Belfast and Manchester were later added) a quick call on box 3 sorted the problem.
I was once boarded onto a Zagreb flight and it was only when I asked a crew member why we had a delay that I discovered that I wasn’t on the Zurich BA flight; fortunately the Zurich flight was delayed.