'No-one can expel Catalonia from EU' says Raul Romeva
9 September 2015 Last updated at 10:58 BST
Raul Romeva, a leader of the pro-independence coalition Together for Yes, has told BBC HARDtalk why he believes that an independent Catalonia could still be part of the European Union.
Catalonia is holding regional elections on 27 September 2015 which some view as a de facto vote on Catalan independence.
"Together for Yes" comprises political groups from both the left and right who have come together in the face of continued opposition to a legal referendum from the Madrid government.
You can see the interview in full on BBC World News on Wednesday 9 September 2015 at 15:30 GMT and 20:30 GMT. It will also be shown on the BBC News Channel at 20:30 BST.