Karen i think it was yourself i met at Tywcross Zoo earlier this year when i came to see the snowleopard cubs?... if so then now you know the feel i had about seeing those two little guys...lol
As far as i am lead to believe the ticket system is only till the end of January... however they might put it back in place at busy times... i think its kinda a wait and see thing. You need to prebook your ticket to get to see the pandas and their enclosure. Mines is already booked for the 13th of December... extremely excited! infact its whats gonna get me through working 5 12hr shifts next week...lol
There are some tickets available each day at the entrance but on a first come first served basis so to guarantee a viewing then you need to book a slot online at least 24 hours before you visit.