Far-right Dutch MP Geert Wilders has won an appeal against a Home Office decision barring his entry to the UK.*Emphasis in bold added
The Asylum and Immigration Tribunal ruling overturns a government decision that led to Mr Wilder being turned back at Heathrow in February.
The Freedom Party leader - who has been accused of Islamophobia - was due at a House of Lords screening of his film linking the Koran to terrorism.
The Home Office said it was disappointed at the new ruling.
A spokesman said: "We are disappointed by the court's decision. The government opposes extremism in all its forms.*
"The decision to refuse Wilders admission was taken on the basis that his presence could have inflamed tensions between our communities and have led to inter-faith violence. We still maintain this view."
BBC home affairs correspondent Danny Shaw said that a further appeal by the Home Office or a new ban on different grounds were possible.
The refusal to admit Mr Wilders in February prompted "a very heated debate at the time", our correspondent added.
"There were people that said, 'Look, we don't like his views. His views may be unpleasant, they may be something we don't agree with - but he should be allowed in to express those views and show his film, and we can argue and debate with him.'
"There were others that said, 'It would actually inflame tensions. This is not the kind of person that we want to have.' That was very much the line that the government said at that time."
UKIP invite
Mr Wilders faces trial in his own country for inciting hatred.
In February, he had been invited to the House of Lords to show his controversial film Fitna, which caused outrage across the Muslim world when it was posted on the internet last year.
When he was refused entry, Mr Wilders told the BBC it was a "very sad day" for UK democracy.
"I'm not doing anything wrong. I'm not protesting or running through the streets of London," he said.
"Democracy means differences and debate. It's a very sad day when the UK bans an elected parliamentarian."
He had been invited to the House of Lords by the UK Independence Party's Lord Pearson.
The peer said it was a "matter of free speech", telling the BBC: "We are going to show it anyway because we think MPs and peers should see this film."