Andy Burnham has blamed Britain’s migrant crisis on Brexit , arguing that leaving the EU had left the UK with “weaker control”.

The prime minister said on Monday that he wants to see Britain rejoin the European Union in his lifetime, after he reopened the Brexit debate earlier this year.

Mr Burnham ruled out a return for the UK to EU freedom of movement rules without a referendum, after he signalled he could include the move in Labour’s next election manifesto .

But the prime minister said he did not think “things have worked out as people said they would at the time”, highlighting immigration and the small boats crisis.

“I don’t think things have worked out as people said they would at the time, particularly when it comes to immigration,” Mr Burnham said.

“I think we’ve got weaker control now.…