Banded gila monster (Heloderma suspectum cinctum); there are two of them in an enclosure that belonged to the now sadly deceased African rock python (Python sebae)
About 7 months ago, a man was detained in Cornellà de Llobregat (town adjacent to Barcelona), found in possession of various illegally obtained firearms and 40 illegally obtained reptiles, most of them venomous snakes, among them a Komodo dragon which was found in a very bad state. Three varanids, including the V. Komodoensis, the others being a V. Varius and a V. albigularis, and these two Heloderma suspectum cinctum, and a currently off-show heloderma horridum, have been taken in by the barcelona zoo, but on account of their policy against venomous snakes, such animals have been taken in by other institutions, like the CRARC and La Escola de la Natura.
Here is a newspaper article concerning the case (in Spanish): Localizado un dragón de Komodo en un local de Cornellà de Llobregat