Cheapest online right now.
This amazing title is 3 hours in length and is what blu-ray was made for imo. Will perfectly compliment your BBC Planet Earth and Life Blu-Rays!
Aspect ratio 1.7:1 so no nasty borders as evident on a lot of blu-rays!
This is part of the 2 for £17 blu-ray offer on Amazon so you can include another Blu-ray worth up to £11.95 for an extra £7. (I just went for Galapagos as nothing tickled my fancy)