Prime Minister David Cameron said he does not want to see "deals or pacts" at the next General Election.
When asked on Daybreak whether he would consider a deal with Ukip, Mr Cameron said: "I want to offer people at the next election a strong Conservative Government with a clear mandate to keep on growing our economy, paying down our deficit, delivering for hard-working people.
"Of course, if local Ukip supporters or candidates want to support the local Conservative candidate because that's the only way you can be guaranteed an in-out referendum in Europe ... then of course I'd welcome that."
More top news
Pregnant women and new mothers are suffering growing discrimination at work, according to a new report.
More than one in four Britons aged 55 and over financially support their child or other dependents to get on to the property ladder.
Known as 'spice' and 'black mamba', the so-called legal high is suspected of contributing to deaths in male and female institutions.