From my own experience, I think that UKIP is hot on the heels of the BNP as an ultra-right wing party. Seems I'm not the only one - here are the words of Dr Alan Sked, who originally founded UKIP:

"If the party is really so obsessed with race, immigration and Islam, it should simply merge with the BNP, which it increasingly resembles. Why have a competition in intolerance? Why not present a united front? After all the political expediency that drives both these anti-EU parties to take up seats in the European Parliament surely dictates such a measure. But let us dismiss any thought that either of them represents "British values".

I founded UKIP as a tolerant, liberal and democratic party. By 1997 I could already see the far-right writing on the wall and quit as party leader and member. It is a decision that I have never regretted, now least of all. I hope that all decent people will condemn the party..."