After 1975, will Shetland say no to the EU this time?
The last referendum on Britain's membership of what was then the European Economic Community was in 1975 when Shetland and the Western Isles voted to leave.
Prime Minister David Cameron is in Brussels trying to agree a deal on changes that will pave the way for the UK's future membership of the EU.
If an agreement is reached, a UK vote on the country's membership could be held in June.
More than 40 years on from the first vote, BBC News correspondent Lorna Gordon has been to Shetland to gauge what the mood is this time.