I haven't seen them all, but I think Cotswold's is the best that I have walked through.
I have emboldened part of your idea, leiclad, as I fear it wouldn't get off the starting pad.
Westminster City Council have seen Hanuman langur, Bolivian Squirrel Monkey and Eastern Colobus breakouts in recent years. No way are they going to countenance another walk-through primate facility by the banks of the canal. Hotwiring won't appease them either, they'd see it as a H&S risk.
Unless there's a big, easily secured area of woodland, lemur walk-throughs seem to end up as Ring-tailed Lemur exhibits. Ruffed Lemurs throw their weight around too much, Sifaka are too precious and nearly all the other available taxa are too retiring.
Each to his own, but to me lemur walk-throughs are evidence of zoo marketing departments refusing to engage the public with the concept that zoos hold wild animals, and are not exotic pets' corners.
Tbh Ian has hit the nail on the head there, walkthru's are probably more of a marketing/publicity thing than a necessity for the lemurs.
Actually its not that big as the only 2 that are smaller than it are Bristol Zoo and Cotswold Wildlife Park,all the other walk throughs I would say are larger than the one at Twycross!The one at Twycross is quite big, it's just frustrating how it's more of a walk by than a walkthrough. But it is well vegetated, and hopefully they put some more lemurs species in here. I thought a good development for the walkthrough at Twycross is to put tortoises in the empty bit to the left in the exhibit.
Actually its not that big as the only 2 that are smaller than it are Bristol Zoo and Cotswold Wildlife Park,all the other walk throughs I would say are larger than the one at Twycross!
I did see the one at Cricket St. Thomas firsthand, and thought it was very good and natural and may well have been the UK's largest lemur walk-through in its day, and it's a huge shame that Cricket St. Thomas Wildlife Park is no more.
I was not a fan of Cricket at all. It was a beautiful setting, but the wildlife park did nothing for me.