Wonderful! What key is he playing in?

Whistle
1

http://www.youtube.com/watch?v=3qWmeGfJX3w

2

B minor, Cameron. A ‘D’ whistle works perfectly.
Best.
Byll

3

Low D Whistle: BMin (Furze), DMaj (Cordal), BMin/AMaj (Black River), BMin (September), DMaj (Tulla)

The keys are marked in the TheSession links (but the first is wrong).