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."
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A major search operation has been launched for 25-year-old junior doctor Rose Polge who has not been seen since Friday.
Former Liberal Democrat MP Lord Avebury, known for campaigning for democratic and human rights, has died aged 87.
A late Danny Welbeck header gave Arsenal a vital win over ten man Leicester at the Emirates.