Just look up Tommy Robinson.

> He was a member of the British National Party (BNP), a British fascist political party. [1]

A march in honor of Tommy Robinson, who is a fascist. Not sure what else to tell you.

[1] https://en.wikipedia.org/wiki/Tommy_Robinson

Post the rest of the sentence,

> He was a member of the British National Party (BNP), a British fascist political party, from 2004 to 2005.