FREE now and never miss the top politics stories again. SUBSCRIBE Invalid email Sign up fornow and never miss the top politics stories again. We will use your email address only for sending you newsletters. Please see our Privacy Notice for details of your data protection rights.

Counter-terrorism expert Michael Clarke, who specialises in defence studies, has urged the public to be ready for “cyber warfare” within the next two or three weeks. He said: ”I suspect Russia will choose not to respond in military terms. But cyber warfare is highly likely. "It will be an attack on national infrastructure, not just upsetting city firms, but getting inside the transport system, or the health system, or air traffic control. It could affect everyone." The UK, US and France launched 105 missiles at suspected chemical weapons sites in three strikes in Damascus and near Homs on Saturday.

President Putin warned the US-led strike against Syria would result in “consequences” against the Allied forces, without stating what they would be. Will Russia launch CYBER warfare? Boris Johnson has warned Britain needs to take “very possible precaution” to protect itself against possible Russian cyber attacks”. Speaking on the BBC’s Andrew Marr Show on Sunday, the UK foreign secretary said relations between both countries had declined with the poisoning of Sergei and Yulia Skripal, and Saturday’s missile air strikes in Damascus and Homs.

Syria air strikes latest pictures: US, UK and France attack Damascus Sun, April 15, 2018 The United States, France and Britain have launched military strikes in Syria to punish President Bashar Assad for an apparent chemical attack against civilians and to deter him from doing it again. Play slideshow REUTERS 1 of 24 The destroyed Scientific Research Centre is seen in Damascus

Commenting on whether he was worried about revenge cyber attacks on the NHS and electrical facilities, Mr Johnson said: "I think we have to take every possible precaution. And when you look at what Russia has done, not just in this country, in Salisbury, attacks on TV stations, on the democratic processes, on critical national infrastructure – of course we have to be very, very cautious indeed.” The Foreign Secretary said there was evidence Moscow had carried out cyber attacks targeting national infrastructure before. Ministry of Defence officers and the Government Communication Headquarters (GCHQ) are now said to be on high alert for possible cyber warfare.

GETTY Syria attack: Will Russia launch CYBER warfare?

The NHS has proven to be a weak target for cyber attacks in the past. In 2017, more than a third of health trusts in England were targeted by the WannaCry ransomware, leading to the cancellation of 6,900 appointments. It was the NHS’s biggest cyber attack to date. Why would the UK be at risk? Britain is blamed for its role in Saturday’s attacks, with the Royal Air Force confirming four of its Tornado GR4s were used in an assault at a base 15 miles west of Homs.

REUTERS Syria attack: Boris Johnson says UK needs to take 'every possible precaution'

US NAVY Syria attack: A Tomahawk cruiser used in Saturday's military air strikes