Not quite. Paignton had only 3(2.1) until very recently, and have now acquired another 0.2, but that still totals on 5. Wingham near Howletts have a group of 6 also (unless they have already bred).
I knew it was a 'W'. Always surprised little satellite zoos can survive here and even prosper in the shadow of Howletts with all their 'big' species. I intended to visit Wingham when I was last there but time ran out.