Proposals to lower the voting age to 16 in the independence referendum have been formally lodged with the Scottish Parliament.

The Bill sets out the franchise for the ballot, due in autumn next year.

Politicians at Holyrood will determine the arrangements, as agreed in Edinburgh last year between Prime Minister David Cameron and First Minister Alex Salmond.

The Scottish Independence Referendum (Franchise) Bill is necessary to ensure all eligible 16-year-olds will be able to register in a canvass scheduled to run from the end of the year to next spring.