Hurricane

The air battle sequences were shot using a combination of replica cockpits, life-size replica Hurricane on gimbal, real Hurricane (one of only nine in the world) and visual effects.

In several scenes in the movie, a German Messerschmitt Bf109 is seen entering into a dive, trying to shake a Hurricane on its tail. The Hurricane dives after the 109, catches up with it, and shoots it down. This is somewhat implausible, since the 109 was much faster than the Hurricane (and the Spitfire) in a dive - diving was pretty much a sure-fire way to escape a British fighter.