What do they gain by joining? Seems like they already have all the benefits they could want, but lose their fishing rights if they joined?

> A Yes vote would not be a final decision on joining the EU. It would mean backing a move towards an accession agreement. Any deal would then have to be approved by a second referendum, as well by parliament

Makes sense. Which is why I was baffled when the UK just up and left after a referendum, as if it were legally binding or something.