China accused of hacking UK’s armed forces in huge cyberattack – how bad is it?

This kind of a breach in a government department in charge of UK defence is ‘significant,’ cyber security expert James Sullivan said. Sullivan, director of cyber research at the Royal United Services Institute, a defence and cyber security think-tank in London, told Metro.co.uk: ‘By nature, any data that is compromised in an organisation like that is a serious incident.’