Will the "Anti-Fascist" movement be able to "Stop" the BNP?

Apparently the Unite Against Fascism group are bringing together large groups of people for a conference. They want to bring people together from across the political spectrum including people from the Left, like Socialist Parties, people from also the New Labour Party, the Liberal Party and the Conservative Party. They plan to come up with a plan to "fight" the BNP or oppose the BNP. They believe that the rise in support for the BNP will allow that party to use their new foothold to promote nasty bigotry and race hatred in communities across Britain and Northern Ireland. Will they be able to come up with a viable plan to prevent an increase in support for the BNP?