This one from Twitter
— Professorhinky (@professorhinky) April 18, 2015
Yes it is. You can tell a great crested newt by the dark rough skin, they are also known as ‘warty newts’ and a simple way to tell the sex is that males have a white stripe running along the side of the tail. In spring the males will also have the famous crest along the back but the white stripe is present all year round.