Ukip leader Nigel Farage conceded his party had been defeated during the by-election, but hailed the result as Ukip's "strongest ever by-election performance".
Speaking after the result, Mr Farage said: "I think there'll be an awful lot of Conservatives with a majority of less than 10,000 who will look upon this result in sheer horror."
But he admitted he would have liked to have done better in Newark.
"Yes, I mean the majority's halved, but nonetheless for Ukip it's still a good night's work," he said.
More top news
A driver who left two sisters paralysed after his 4x4 smashed into their family car during a road rage chase, has been jailed.
Canuck, a notorious crow in the Vancouver area, has been accused of taking off with a weapon from a crime scene.
What's the optimum driving speed? Can you rely on jerry cans? Plus real-time information on how low fuel has got at French petrol stations.