North Korea was probably behind the devastating WannaCry cyber attack which crippled the NHS in May, the Home Office has said.

Home Office Minister Ben Wallace said the Government believed ‘quite strongly’ that a foreign state was behind the ransomware attack and named North Korea, claiming the country was trying to raise cash.

Pyongyang has been widely blamed for the May cyber attack in security circles, and Microsoft's president, Brad Smith, has also pointed the finger at Kim Jong Un's secretive state.

Mr Wallace said: "This attack, we believe quite strongly that it came from a foreign state.

"North Korea was the state that we believe was involved this worldwide attack."