"On 7 June 1934, at the notoriously violent (BUF) rally at West London’s Olympia stadium, a young anti-fascist seaman... climbing on the roof... and crawling along the girders... above BUF leader Sir Oswald Mosley, where he remained shouting anti-fascist slogans. ...Eyewitnesses described unprecedented political violence... by fascist thugs... armed with... weapons. ... ...made it his business to speak out, actions that would lead to one of the most extraordinary legal battles of the period. ...Mosley founded the BUF whose 'Blackshirts' were frequently involved in street violence. ...Marchbank ...took on the aristocratic fascist leader in the courts ...Marchbank was reported to have said: “We strongly object to... assembling in the guise of a military machine with the object of overthrowing by force the constitutional government of the country.” ...Mosley ...sued for slander. ...Following ...legal victories, the [Almagamated Engineering Union] AEU and NUR general secretaries wrote a joint introduction to an LRD pamphlet aimed at trade unionists, called Fascism – Fight It Now."