The British Prime Minister David Cameron is insisting he won't trigger the UK's exit from the European Union.

He says it will be up to his successor to negotiate the Brexit.

He made the comment after attending his last European Council summit in Brussels last night.

The talks were described as sombre and constructive.

David Cameron told EU leaders the UK voted to leave the union because people feel there's no control over immigration from Europe.

But Mr Cameron said he'd continue pressing for close relations between the UK and the EU: