That Hurricane was the Hurricane Mk.XII, and the Bf109 was an E-1 if I remember right.
Interesting to see a kawasaki Ki-61 ('Tony') with ski's.
Austers used by the RAF and RNZAF in Antarctica also had ski's. Some RAF Austers even had floats. Maybe floats could be included here too? there was even a Spitfire fitted with them!