<sod >Catalan leader has threatenedÃÂÃÂ to explicitly declare independence if no talks are offered, in a letter to Spain's prime minister.< eod>< sod > Catalan leaderÃÂÃÂ CarlesÃÂÃÂ PuigdemontÃÂÃÂ has threatened to explicitly declare independence if no talks are offered, in a letter to Spain's prime minister.< eod>