I would have thought that the last thing the BNP needed was a successful Conservative Party building up momentum. Anything that moves politics to the right(even if it's only small) is a good thing, as I have said before it's  not  about winning councillors, we need to get our level of support up to around 10% before the end-game starts(getting councillors does help, but short term small gain is not what it's all about..although it's nice)