Speakers have begun pulling out of the major cultural festival in London, accusing it of not supporting free speech

The ban on the left-wing commentators has shocked many across the political spectrum.

Hasan Piker and Cenk Uygur both claimed to have had their visas revoked by the U.K. Home Office, preventing them from attending SXSW London.

Green leader Zack Polanski has called the decision ‘really grim’