For Friday evening, the assumptions above would most likely be correct - fuel is currently relatively expensive in Belfast City, so crews bring in as much cheap fuel from elsewhere as they can, and the airport had been landing on runway 04 most of the day. Approaching down Belfast Lough would mean landing on runway 22, which is the opposite end, and if the weather was the same as it had been earlier in the day, probably involved a tailwind of around 7-8 knots, well within the allowed limits for the Dash.