Cameron denies 'dictating' terms of Scottish referendum

David Cameron has said he is not trying to "dictate" the terms of a Scottish independence referendum.

Government sources have denied reports Westminster would set an 18-month limit on holding the poll, if it transfers powers for a binding vote to Holyrood.

But ministers may insist on a "yes or no" vote on independence - without the option of more powers for Scotland.

Nick Robinson reports.