The North Korean elite are outwardly expressing their discontent towards young leader Kim Jong Un and his government as more outside information trickles into the isolated country, North Korea's former deputy ambassador to London said on Wednesday.

Thae Yong Ho defected to South Korea in August last year and since December 2016 has been speaking to media and appearing on variety television shows to discuss his defection to Seoul and his life as a North Korean envoy.

"When Kim Jong Un first came to power, I was hopeful that he would make reasonable and rational decisions to save North Korea from poverty, but I soon fell into despair watching him purging officials for no proper reasons," Thae said during his first news conference with foreign media on Wednesday.

"Low-level dissent or criticism of the regime, until recently unthinkable, is becoming more frequent," said Thae, who spoke in fluent, British-accented English.

"We have to spray gasoline on North Korea, and let the North Korean people set fire to it."

Thae, 54, has said publicly that dissatisfaction with Kim Jong Un prompted him to flee his post. Two university-age sons living with him and his wife in London also defected with him.

North and South Korea are technically still at war because their 1950-53 conflict ended in a truce, not a peace treaty. The North, which is subject to U.N. sanctions over its nuclear and missile programs, regularly threatens to destroy the South and its main ally, the United States.

Read more at Reuters.