7 May 1941 Heinkel 111 P-4 (Werk no. 2874) G1+LL shot down over Bagillt (SW shore of Dee Estuary) by a Defiant of No. 256 Sq.
  No. 256 squadron flew from RAF Squires Gate (later known as Blackpool Airport) in the night defence of Liverpool. The Defiant was a 2-seater (pilot and gunner) with a 4-gun powered turret on its back (so not forward firing) built by Bolton Paul Aircraft at Wolverhampton and used in night fighting. The Defiant intially proved successful since German fighters were used to attacking from above and behind - where the turret gun worked well. As the German pilots learned to attack from below and behind - where the turret gun could not fire - the Defiant's days as a day fighter were over. Instead it was developed as a night fighter - with some success,
  Crew lost: Lt Heinz Dunkerbeck, Fw Fritz Kutzing, Uffz Alfred Gentsch, R/O Uffz Joachim Salm, Gnr Flg Kornel Meldenberger.