The Basque region is one of the most independent in Europe
In a Hardtalk interview broadcast on Thursday 21 June, Stephen Sackur spoke to Pernando Barrena, the spokesman for Batasuna.
ETA, the armed separatist Basque movement, has just abandoned its "permanent" ceasefire with the Spanish government.
The banned group said in a statement that "minimum conditions for continuing a process of negotiations do not exist".
In December, ETA detonated a bomb killing two people at Madrid airport - but insisted that it had not breached the ceasefire.
Stephen Sackur travels to San Sebastian to speak to Pernando Barrena, the spokesman for Batasuna, ETA's political wing.
He asks Mr Barrena if the group is really ready to defy international opinion - and the example of Northern Ireland - and return to violence?
HARDtalk can be seen on BBC World at 0430 GMT 0930 GMT 1430 GMT 1930 GMT 0030 GMT.
It can also be seen on BBC News 24 at 0430 and 2330.