UK Border Controls sign at Heathrow Terminal Five
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Conservative activists urge PM to extend border controls

Ninety senior Conservative activists have urged David Cameron not to lift border controls on Bulgarian and Romanian migrants on 1 January.

In a letter to the PM, they argue he could use a clause in EU law to prevent a "hugely disruptive and destabilising wave of mass immigration".

It allows countries to continue with border controls if they have "serious labour market disturbances", they add.

Iain Watson explains.

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