Thanks for the comments GW, Mole & Penolta !
They are really really cute, I can understand Tachi's longing. I'll send him a stuffed Red Panda toy to quell his desire (don't worry Ash, it won't mark it's territory).
Lighting was truly difficult. The tree was backlit with strong sunlight and there was no way I could go around to the other side of the tree - firstly the Red Panda wouldn't have been visible and secondly as the tree is in their pen then the 'other side' is 50 yds away !
Next time I will take John's advice and take a flash with me - I hadn't even considered taking one this time for a daytime shoot in bright sunlight !