David Cameron promises to protect wildlife after Cecil the lion killing

Prime minister discusses 'issue of tiger bones, and rhino horn' on visit to Vietnam, as Tory minister Grant Shapps writes to Zimbabwean government

David Cameron has promised to step up government efforts to protect wildlife from poachers following the outcry over the killing of Cecil the lion.

He said he wanted to do more to help countries such as Vietnam stop the illegal trade in rhino horn after talks with the Vietnamese prime minister, Nguyen Tan Dung.