London mayor Boris Johnson has rejected the call for an election pact between Conservatives and the UK Independence Party (UKIP), declaring that voters have "had enough" of pacts and coalitions.
He added: "What they [voters] want is to see parties standing up individually for what they believe in."
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Dozens of flood alerts have been issued for swathes of the country as heavy downpours and severe gales are expected.
Four migrants who tried to cross the Channel in an inflatable dinghy have reportedly been rescued by French coastguards.
The victim, a man in his 40s, is being treated in hospital for "life-changing" injuries after the attack by two men who remain on the run.