Principles of Individual Rights like free speech and private property owe no allegiance to political boundaries or to temporary occupants of an office. The BNP gets the microphone. Period.
Otherwise those who decide what is and isn’t “allowed” come after me next.
Or you.
They have a right to speak, but that doesn’t give them a right to use someone else’s microphone. Freedom of speech doesn’t automatically give you the soapbox or stage.