On Thursday, 23 June the EU referendum will be held to determine whether Britain will leave or remain in the European Union, but did you take part in a similar vote back in the 70s?
In 1975, Britain was asked if it wanted to either stay or exit the European Economic Community (Common Market).
Do you remember the Common Market referendum?
We would like to hear from you now if you voted in 1975 and intend to vote in this year's referendum.
Have your opinions of Europe changed since your vote in the 70s? Will you vote differently this time around?
If you are willing to speak to a BBC journalist, tell us your views then and now by emailing email@example.com and include your telephone number.
You can also contact us in the following ways: