We are living in a time created by the politics of fear and the media with it's sensationalist approach just feeds the paranoia, luckily some of us see through the propoganda and do our best to educate others.
The BNP has benefited from another fear, the fear of mass immigration.
The Labour party has done very little to secure our borders or expel illegal immigrants , coupled with an insane policy of prosecution for those seen to be racist , this has resulted in a backlash in the form of more support for the BNP
The impression people across the UK have is that only white people can be racist.
It doesn't help that the creation of a group for "whites only" would contravene the law and yet other race groups appear to be able to proclaim themselves for only one group of society.
This is the BNP site, you might gain more insight from it.
The British National Party

London isn't really representative of the average English people . it's a melting pot of cultures and has therefore lost a lot of it's tradition.