Bearded Pygmy Chameleon

Rieppeleon brevicaudatus - New addition to the collection. If Zootierliste is to be believed, Bristol is the only holder in the UK. Seen in the breeding room of the Reptile House

ZTL lists Berlin as the only holder of this species in Europe.

Yes, and Zootierliste has not been updated.

Or Mediterranean chameleon.

This is not a Mediterranean Chameleon, lowlandanoa as stated by Rajang, it is a Pygmy Leaf Chameleon. I have now added it to ZTL.

No - the Mediterranean Chameleon is also known as the Common Chameleon - Chamaeleo chamaeleon. The pictured species is from Tanzania and Uganda, as opposed to the Common Chameleon's distribution throughout North Africa and Southern Europe.

EDIT: TLD beat me to it

They are quite "common" as pets, I have seen various specimens of all 3 Riepellion species on a reptile fair a few months ago. It is interesting to see them appearing in public collections, especially because they resemble the Malagasy Brookesia species, which I am very fond of.