I think its an African Elephant tooth...they are usualy sloped like this whereas the Asian elephant and mammoth teeth I have seen are generally more parallel. Just my opinion though - happy to be corrected!
I think it is an Asian elephant tooth. It almost Surtainly isn't a mammoth tooth becuause mammoth teeth are usually found in the North Sea, and pic 1 shows a white surface, which you never see in North Sea found fossils. It also has the wrong chewing surface for a mammoth tooth.
Below: the chewing surface of a mammoth tooth (Mammuthus primigenius)