Chancellor George Osborne has said the Newark by-election win was a "strong win for the Conservatives" and it was "disastrous" for the Labour Party.
Asked what he thought of the Ukip performance after the anti-EU party came second, he said:
"The Ukip vote was down on where it was a few weeks ago. We have an argument we can take to the country now about the change Britain needs."
More top news
Ex-football manager Harry Redknapp told undercover reporters his own players bet on the result of one of their own matches, it is claimed.
A soaking then sunshine this weekend
As Hungary prepares to vote in a referendum on the EU's resettlement of refugees, thousands of migrants remain in limbo on the border.