That documentary is on the 3rd volume of the 3 compilations of old "World in Action" programmes which have been released so far:
Of course, there ought to be a special effort to explain to people in the North West, and Yorkshire and Humber regions, which Nick Griffin and Andrew Brons represent in the European Parliament, that if they vote BNP in the 2014 European election, they will be voting for men who were previously leaders of a party which privately wanted to gas British racial minorities and Jews for fun.
That policy was of course not revealed to the public, as its then leader, John Tyndall, told an American fascist, in a letter which "World in Action" obtained, that he wanted the NF to pose as a moderate party, while neo-Nazis controlled it from behind the scenes. It goes without saying, that telling the public that the party planned to gas huge numbers of people for fun, would not have been a big vote winner.
John Tyndall published a pro-gas chambers article in the February 1965 issue of his "Spearhead" magazine, which "World in Action" quoted from, so the NF's gas chambers at future concentration camps plans were hardly surprising:
At the time when the NF was privately planning to gas people, its Yorkshire chairman was Andrew Brons, and the national organiser of its Young National Front Students organisation was Nick Griffin, so did they have no problem with being leaders of a pro-gas chambers party, and, in the case of Brons, with the violent crime convictions of Yorkshire NF members (including the 1976 terrorism conviction for possessing bombs of Leeds NF member Richard Craven, who told police that he was waiting for a chance to assassinate a public figure), which were a major focus of the "World in Action" documentary?
The Special Branch spy alleged that the NF's national and local leadership knew about the violence of NF members (which helped the NF, by increasing racial tensions), but did nothing to stop it, so if that allegation was correct, not only Andrew Brons, but also Nick Griffin was aware that they were leaders of a very violent organisation, whose members clearly had far more convictions per person for violent crime offences, than members of non-fascist parties.