Wilders, who is the leader of the Freedom Party, flew into the UK in the face of a ban from the Home Secretary Jacqui Smith just after 2pm to show an anti-Muslim film at the House of Lords.

He was seized by two border guards who boarded the BMI aircraft as it sat on the tarmac and was marched into a side room in the main Terminal One building.

The politician, who was invited by the UKIP peer Lord Pearson and cross-bencher Baroness Cox, had earlier been warned that Miss Smith viewed his presence in the country as a threat to the fundamental interests of society.

The Home Office refused to confirm the flight on which the politician would be placed.

But Mr Wilderss spokesman in Amsterdam said that he understood that he would sent back to the Dutch capital within two hours.

As he was escorted off the aircraft Mr Wilders said: Is this how Great Britain welcomes a democrat?

He was invited to Westminster to show his 17-minute film Fitna, which criticises the Koran as a "fascist book", by a member of the House of Lords.

But on Tuesday he received a letter from the Home Office refusing him entry because his opinions "would threaten community security and therefore public security" in the UK.

Mr Wilders condemned the British Government as "weak and cowardly" and vowed he would make the trip anyway.

He left Amsterdam on a BMI flight at lunchtime and the aircraft touched down at London's Heathrow Airport at about 2pm.

BMI refused to confirm that Mr Wilders had booked a flight with the airline, citing data protection laws.

A spokesman said only: "We are obliged to observe Government-enforced travel restrictions. If they are imposed, we are duty-bound to abide by them."

Mr Wilders has urged the Dutch government to ban the Koran and warned of a "tsunami" of Islam swamping the Netherlands.

His film sparked violent protests around the Muslim world last year for linking verses in the religious text with footage of terrorist attacks.

He has launched an appeal against an Amsterdam court's order that he should be prosecuted for hate speech.

Mr Wilders said he had already shown his film to Denmark's parliament and would take it to Italy and the US House of Representatives in the coming weeks.

He told the BBC: "I was very surprised and very saddened that the freedom of speech that I believe was a very strong point in UK society is being hara**ed today."

More:http://www.telegraph.co.uk/news/newstopics/politics/4602261/Dutch-politician-Geert-Wilders-to-be-deported-after-being-refused-entry-to-Britain.html