A so-called rebel amendment to the UK Immigration Bill, which would ban Romanian and Bulgarian migrants until 2019, is about to be debated by MPs.

The debate has been prompted by a group of backbench Conservative MPs who want the restrictions to be extended.

It has the backing of Conservatives Nigel Mills, Peter Bone, Philip Hollobone and David Ruffley, and Democratic Unionist Sammy Wilson.

Nigel Mills, the Conservative MP who masterminded the amendment, told the Sunday Telegraph that there was "great concern" among his colleagues about a repeat of the previous influx of eastern European migrants, when there were no restrictions and one million moved to the UK.

The expected influx of tens of thousands of job-seekers from the two countries next year would be a major strain for the economy "when we have still got a lot of people desperate for work who can't find it" in Britain, he said.

The MPs are among more than 70 who have put their names to an amendment to the Immigration Bill that would extend the "transitional provisions" that have applied to Bulgaria and Romania since they joined the EU in 2007, BBC pointed out.

The provisions restrict some rights of Romanians and Bulgarians to work in EU member states, but do not curb travel within the EU.

Parliamentary terms traditionally end with a general debate in the Commons, which allows MPs to raise any topics that they feel merit attention.

The EU immigration debate will take place at the same time in MPs' secondary debating chamber, Westminster Hall.

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