London Mayor Sadiq Khan on Sunday called for a second Brexit referendum as he criticised the Conservative party-led UK government's increasingly "chaotic approach" to the negotiations with the 28-member European Union (EU). He said the fresh vote should offer voters the choice of staying in the EU against any deal the UK government manages to strike or against a "no-deal" Brexit, if an agreement cannot be reached.

Writing in the 'Observer' newspaper, Khan warned that with the UK due to leave the EU in six months, by March 2019, it now faced either a "bad deal" or "no deal". "The need for another public vote on Brexit was never inevitable, or something I ever thought I'd have to call for," he said.