solo - it will not give them more of chance to get in.
They are a smaller party and they will be eliminated quickly (on a national level)
This is part of a wider issue in that (as I have said on another thread) - if the BNP are getting in on votes, then they deserve to be in. I think that they are just about the lowest form of political life, but if they get the votes, they get the votes.
Using a voting system to artificially keep a party down is a silly idea - they need to be eliminated through education at a ground root level.