I'm not sure that UKIP really supports local councillors. I may be wrong, but it all seems a bit of a lucky draw thing.
I remembered the win on Hull city council, so I Googled for it.
First, I got this -
First UKIP council seat sends warning to Tories - Independent Online Edition > UK Politics
Then, I got this -
Hull City Council : Local elections
But a further Google got me this -
Disputed council faces prospect of election re-run | Society | Society Guardian
Whatever happened to Mr.John Cornforth? His original victory turned into spectacular defeat this year. Was he supported, or was he left to his own devices?