Senior Conservatives today sought to insist David Cameron's plan to claw powers back from Brussels remain on course after Germany refused to 'tamper' with freedom of movement laws. The Prime Minister has vowed to put immigration at the heart of his renegotiation with the European Union, reassuring voters he will act to control the UK's borders. But German Chancellor Angela has made clear she will not allow Britain's calls for reform to 'interfere with the fundamental principles of free movement in Europe'. Scroll down for video Angel Merkel has made clear she is not open to renegotiation on the free movement of people across the European Union
@highlight
Chancellor says she agrees on tackling issues such as migrant benefits
@highlight
But Merkel is opposed to any fundamental change on make-up of Union
@highlight
Her stance scuppers Cameron's plans for shake-up on migration rules
@highlight
Prime minister hoped to claw back control over Britain's borders from EU
@highlight
Tory leader had also pledged a quota on unskilled migrants into the UK
David Cameron had indicated  migration reforms as key to mooted renegotiation of the @placeholder's membership terms