Originally Posted by
corporate-wage-slave
Perhaps transferring passengers between aircraft after the first one was deemed faulty?
From the last time this happened to me, although we were actually heading A3 or 5 to a B gate:
I remember the flight well as I ended up discovering I was sitting next to one of the shift station managers at EDI, a former BA LHR operations manager. Absolutely lovely lady, and completely impressed by my level of Avgeek knowledge about utterly basic things like there being a runway called “27L”.