David Cameron has hailed the Newark by-election result as "very good for the Conservative Party" but he said the Tories needed to "work between now and the next election" to win back voters from Ukip, who came out second in the by-election.
The PM was speaking in Bayeux, France ahead of D-Day commemoration events.
Asked how he would win back support from Nigel Farage's party he acknowledged the challenge posed by Ukip:
"The job isn't finished yet but we are on the right track, let's stick at it."
More top news
A Russian army deserter was detained by police after he was found in a makeshift shelter in a forest where he had been hiding for 11 years.
MPs are gearing up for the vote on whether Britain should join airstrikes in Syria -but what weapons are at the UK's disposal?
A council will hand out £100 fines to dog walkers who leave home without poop bags regardless of whether their pet fouls or not.