‘Crazy’ ESG investing rules that deter investment in defence companies are a threat to Europe’s security, Nato’s secretary-general has said.

Speaking at the World Economic Forum in Davos, Mark Rutte called out banks and pension funds that are restricting investment in the sector, according to The Telegraph.

‘We are still not able to explain to the pension funds, to the banks, the difference between illicit drugs and pornography on the one hand and spending on our collective defence on the other,’ he said.