The founder of far-right anti-Islam group Pegida has been barred from entry to the UK and deported from Stansted airport.
Lutz Bachmann, who has led anti-immigration marches of tens of thousands of people, landed at Stansted airport on 17 March.
He was detained and subsequently expelled from the UK on the morning of 18 March.
The Home Office said Bachmann was refused entry on grounds his presence in Britain was not in the interest of the public good.
“Border Force has the power to refuse entry to an individual if it is considered that his or her presence in the UK is not conducive to the public good,” said a spokesperson.
Supporters say Bachmann was due to speak alongside Tommy Robinson – the former English Defence League leader who founded a subsidiary branch of Pegida in the UK – at Speakers’ Corner in Hyde Park on 18 March.
The 45-year-old founded Pegida, which stands for “Patriotic Europeans against Islamisation of the West”, in October 2014 to demonstrate opposition to plans for 14 refugee centres in Dresden, Germany.
Branded “Nazis in pinstripes”, the group has been widely accused of racism, fascism and xenophobia.
Bachmann stepped down from his official role as leader in January 2015 after a picture of him dressed as Hitler surfaced on Facebook. He dismissed the image as a “joke”. However, he then capitalised on a resurgence of concerns around a migration influx and returned to his post after the outcry had subsided a few months later.
According to the Sachsische Zeitung newspaper, Bachmann has several criminal convictions. They include 16 burglaries, driving drunk or without a licence and dealing cocaine.
In 1998, after Bachmann was sentenced to a number of years in prison, he fled to South Africa but was deported back to Germany.