Stoop do you mean next year's local elections? Yes UKIP has shown that it is capable of taking votes from Labour, even before Corbyn, but is unlikely to win many more councillors than their high water mark 2-3 years back, and their impact on the Labour vote in Parliamentary elections earlier this year. UKIP have shown when it comes to it they do not beat the Tories. As indeed has no challenge to the dominant single right wing party in the UK (or perhaps that should be England) has ever been successful - whether from the right or the left - and UKIP will be no different.
I think Farage recognises that now and UKIP - under his direction - will be refocused on its original single issue purpose, EU exit, through the referendum campaign. Rather than being a broad based party with a wide programme of policies for government. We shall see how Farage works with the other 'out' groups, but I rather suspect he will lead and they will be forced to follow. I suspect that Cameron will regret playing the referendum card to placate his right wing 'exiteers', because if he loses the referendum and the UK exits, that will be his single political legacy ..... not much for the political headstone!!

Those taking issue with the comparison with Churchill and De Guale, I accept your points on comparison with political giants, but the point I was trying to make was, despite their unpopularity at that time with huge swathes of the British and French population, respectively, they did carry the day in the end ..... cometh the hour .... cometh the man!