How will the referendum work?

• More than 4.1m voters in Scotland will be eligible to vote in the referendum on 18 September, including about 124,000 teenagers aged 16 and 17 being allowed to vote for the first time

• Voting will be held in the traditional format for elections, with polling stations opening at 7am and closing at 10pm

• The count will take place from 10pm on Thursday night in all 32 local council areas, with results announced through the night from 2am on Friday with a result now estimated at 7am

• The electorate includes any British citizen resident in Scotland, Commonwealth citizens with rights to UK residency, citizens from all other EU member states

• The Scottish government has barred prisoners from voting despite protests from human rights groups and legal challenges. Scotland-born voters living elsewhere in the UK are also barred as they do not have Scottish residency, but this has been controversial

• A record number of more than 640,000 people have registered for postal votes, with voter registration closing for the referendum on 2 September