Ousted Catalan leader Carles Puigdemont has vowed to form a new government despite what he described as "threats" from the central government in Madrid.

Speaking at a debate on Catalonia at the University of Copenhagen, Mr Puigdemont said: "We will not surrender to authoritarianism despite Madrid's threats. 

"Soon we will form a new government. It’s time to end their oppression and find a political solution for Catalonia."

Earlier, Spain's Supreme Court rejected the state prosecutor's demand to reactivate a European arrest warrant for Mr Puigdemont.

Spanish prosecutors had sought to reactivate the warrant, as the former Catalan leader landed in Denmark for his first trip away from Belgium in three months of self-imposed exile.

The decision to reactivate the arrest warrant was postponed until the Catalan parliament is restored to normal activity, the court said in a statement.

Mr Puigdemont fled to Brussels in October after authorities in Madrid sacked him and accused him of sedition over an illegal referendum and a unilateral declaration of independence from Spain by the Catalan parliament.

He is the top candidate to lead Catalonia again after regional elections last month gave separatist parties a majority.

Shortly after his arrival in Copenhagen, Spain's state prosecution service said it had asked the Supreme Court to reactivate the warrant, on charges of sedition and rebellion, originally issued - and later lifted - after he fled to Belgium.

After weeks of uneasy calm, the political crisis triggered by Catalonia's independence drive flared up again last week when the new regional parliament elected a separatist speaker at its first sitting.

Speaker Roger Torrent announced this morning that he proposed Mr Puigdemont to be the Catalan president.

Mr Puigdemont said on Friday he could be re-elected and govern remotely from Brussels, but the Spanish government said it would not let that happen.