sentences:  On 20 April, the aircraft were flown, via RAF Sealand, to Scapa Flow, Scotland where Fleet Air Arm pilots landed them on the aircraft carrier  and 18 Gladiators sailed for Norway.On 24 April, after two days sailing, the Squadron flew its aircraft off the carrier to a landing strip on the frozen lake Lesjaskogsvatnet in Oppland in central southern Norway.Unfortunately for the enterprise, the squadron was extremely short of ground staff and equipment and few of its Gladiators had been prepared for combat, when the Luftwaffe struck with Heinkel 111s shortly after daybreak on 25 April.