British historian David Irving returned to England the day after he was released early from an Austrian prison - vowing to repeat views denying the Holocaust that led to his conviction.

Irving said Thursday he felt "no need any longer to show remorse" for his views on the Holocaust, for which he was sentenced to three years in prison.Vienna's highest court granted Irving's appeal and converted two-thirds of his sentence into probation on Wednesday.

Upon arriving at London's Heathrow airport, he also called for a boycott of all Austrian and German historians until laws which make Holocaust denial illegal in those countries are overturned.

Willfried Kovarnik, head of Vienna's immigration police, said Irving had been indefinitely banned from Austria and that he had spent Wednesday night in an Austrian detention center. Irving said he intended to appeal that decision.

In February, Irving was convicted under a 1992 law which applies to anyone in Austria who denies, plays down, approves or tries to excuse the Nazi genocide or other Nazi crimes against humanity. The law calls for a prison term of up to 10 years.

The Austrian judge who ruled in favor of Irving's early release from jail is considered to be a supporter of Jorg Heider's rightist Austrian Freedom Party, the Austrian news agency APA reported on Wednesday.

When Haider's party was a coalition member, judge Ernest Mauer was appointed as member of the Austrian Broadcasting authority Osterriechischer Rudfunk.

Following his conviction for denying the Nazis' organized the mass murder of 6 million Jews, Irving had appealed for a reduced sentence while the prosecutor wanted a longer one.

Irving has been in jail since his arrest in November 2005 on a visit to Austria, which was part of Germany's Third Reich from 1938 to 1945.

The Vienna court ruled his sentence should be changed from a jail term to probation and that Irving was free to leave.

"He is free, and he can leave, and he will leave," said his lawyer Herbert Schaller.

Austria had issued an arrest warrant for Irving in 1989 for denying the Holocaust in lectures and in a press interview he gave the same year.

Iriving has contended that most of those who died at concentration camps like Auschwitz succumbed to diseases such as typhus rather than execution.