The Prime Minister said today he was concerned by the increasingly heated rhetoric coming from the Korea Peninsula.
Speaking at a PM Direct event in Glasgow, he said that it is countries like North Korea that necessitate Britain having a nuclear deterrent going forward:
More top news
Mixed fortunes across the UK tomorrow. Still breezy across the north.
The Labour leader said socialist politics would not be put "back in a box" as he appeared on stage at the festival.
There are reports that at least some MPs and Lords have been left unable to access their emails as a result of the attack.