They are strictly protected by European laws, and although the English authorities seem to think they don't belong to the European Union the contrary is true. Only captive bred specimens are allowed, but then the breeders must give you the papers of how he got his animals.
As far as I know (and my literature is pretty up to date), nobody has bred them in captivity. So...what is offered to you is very lickley to be illegally caught....
The habitat is very identical to Salamandra or Salamandrina habitats. Very small slowrunning streams, in moist woodland area's.
greetings, Sergé