‘Russian criminals’ behind London hospitals cyber attack

King’s College Hospital, Guy’s and St Thomas’ – including the Royal Brompton and the Evelina London Children’s Hospital – and primary care services are among those affected.

Mr Martin told the programme: “We believe it is a Russian group of cyber criminals who call themselves Qilin.”

He said the group, which operates on the dark web, operated “freely from within Russia”.

The cyber security expert explained that the group had previously attacked automotive companies, Australian courts and the Big Issue in the UK.

He said: “They’re simply looking for money,” but said the British government had a policy of not paying ransoms.

He told the BBC that the criminal group were “unlikely” to have known they would cause healthcare disruption when they organised the attack.

He added: “There are two types of ransomware attack. One is when they steal a load of data and they try and extort you into paying so that isn’t released, but this case is different.

“It’s the more serious type of ransomware where the system just doesn’t work.”

Mr Martin said the attack was “one of the more serious that we’ve seen in this country”.

When asked about patient data, he said: “It’s not really a question of data in this one, it’s a question of the services.

“The criminals are threatening to publish data, but they always do that. Here the priority is the restoration of services.”

The NHS apologised for the inconvenience and said it was working with the National Cyber Security Centre to understand the impact.

Synnovis said it was unable to comment further on the attack.