The UK government has revoked travel authorisations for pro-Palestinian figures Hasan Piker and Cenk Uygur, preventing them from entering the country ahead of scheduled speaking engagements in London.

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

The United Kingdom’s Home Office said Piker and Uygur were blocked from entering the country because their presence “may not be conducive to the public good.”