I was one of the bridge lookouts when the Lanc found us. The officer of the watch was a naval pilot, Brian Bell-Irving. The Lanc erred in its I.D., and Bell-Irving said "Make to the aircraft - we've just shot you down". The Lanc flew off, and returned at bridge level, flying slowly. The aircraft navigator's window slid open, and a hand emerged. The "bird" was flipped at Bell-Irving, who vowed that he'd find out who it was and exact revenge!