sentences:  Around this time the squadron received 22 Gloster Gladiator Mk.IIs to replace the Mk.Is
  
  The Gladiator may look like a First World War aircraft but with twice the speed of most First World War fighters it had considerably better performance.As a fighter, it did not compare well with the type of enemy aircraft it might expect to meet in the Second World War, being only slightly faster than the Heinkel 111 bomber.Germany invaded Norway on 9 April 1940 and 263 Squadron was soon instructed to prepare for a move.