BBC News - David Cameron urges EU support for migration plans: "Britain's prime minister said lower EU migration would be a priority in future negotiations over the UK's membership and he would "rule nothing out" if he did not get the changes he wanted.
Under his plans, migrants would have to wait four years for certain benefits.
Brussels said the ideas were "part of the debate" to be "calmly considered".
Mr Cameron said he was confident he could change the basis of EU migration into the UK and therefore campaign for the UK to stay in the EU in a future referendum planned for 2017.
But he warned that if the UK's demands fell on "deaf ears" he would "rule nothing out" - the strongest hint to date he could countenance the UK leaving the EU."
