Alistair Burt, who served as a Foreign Office minister from 2010 to 2013, said on Monday evening that politicians had to make sure to counter the "negative" view of migration.

"Without immigrants in this country at the present it would fall apart. The reason why free movement of labour in Europe works is because we are taking people from sclerotic European economies - and thank goodness we are," he said.

"They are coming to work here. It eases a problem somewhere else and helps our economy grow with many benefits to all of us."

Burt, who is seeking reelection as MP for North East Bedfordshire in May, was speaking during a general election event hosted by the central-London St Martin-in-the-Fields church.

He said politicians needed to be clear that inward migration was a "positive force" for the country. "There are issues about numbers, no politician will deny that, but in countering the new fascism we've got to be bold enough to recognise what immigrants are bringing to the UK and be very clear about their value."

The former minister said the "rise of the new Right" across Europe, including the Pegida movement in Germany, was "deeply frightening" and needed to be challenged.

Burt is not the only Conservative to be concerned about the rhetoric around immigration. Last week David Cameron was urged by modernising Tories to stop trying to "appease" Ukip voters and abandon any plan to include a net migration target in the party's general election manifesto which is launched today.

Source: Huffington Post UK