London, UK. 7th October, 2017. Campaigners against the ivory trade take part in a silent protest in Parliament Square to mark the fourth Global March for Elephants and Rhinos' March Against Extinction, intended not only to raise awareness of the plight of elephants and rhinos and the role of the antiques industry but also to apply pressure on the British Government to maintain a full ban on ivory. Credit: Mark Kerrison/Alamy Live News Stock Photo