Bank of England governor Mark Carney is giving his starkest warning yet about the possibility of UK voters choosing to leave the European Union, warning that the risks of leaving "could possibly include a technical recession".

Campaigners for the "Vote Leave" side criticized Mr. Carney and one even demanded his resignation.  Prime Minister David Cameron, who wants to stay in the EU, said the warning amounted to "a very clear message" of the dangers of the so-called "Brexit". 

Carney's own spokesman said the Bank of England had "a duty" to tell voters of its judgments: "Assessing and reporting major risks does not mean becoming involved in politics; rather it would be political to suppress important judgments which relate directly to the Bank's remits and which influence our policy actions."

Meanwhile, French economy minister Michel Sapin told the BBC that a Brexit would boost the far right across Europe.  "In all of our countries we've seen an increase in popularism and the extreme right.  We all believe that if the UK leaves these forces of the extreme right will become stronger and it will be the same thing in all our countries and yours," he said, warning that a Brexit will trigger a "domino effect" of national referendums to leave the European Union. 

"Can you imagine how that would work and look if each European country turned into itself and shut its borders, going back 50, 100 years into the past?" he asked.  "You can imagine that would be extremely damaging for the United Kingdom and its population."