Defence Secretary John Healey tells Laura Kuenssberg what Putin fears most

Defence Secretary said that Britain is now operating in "a world of growing aggression" and must respond. Speaking on Laura Kuenssberg's show, Healey dodged questions on the possibility of developing a new delivery system for , as he promoted their importance in deterring Russian aggression.

He said: "I won't get into the discussions which need to remain private, not public, but my job as defence secretary is to keep the public safe." On the nuclear deterrent, he added: "For 70 years, the UK's nuclear deterrent has been the ultimate guarantee of security in this country, it is what Putin fears most and we are the only nation in that commits our nuclear deterrent in full to the defence of other NATO allies. "Strong deterrence is absolutely vital to keep us and our NATO allies safe."

When asked by if he expects Russia to attack the UK, Mr Healey replied: "Russia is attacking the UK daily as part of 90,000 attacks that we get that are linked to different states on our defence system in cyberspace.

"It's one of the reasons that we're acting already by putting an extra billion into creating a new cyber command and to link our with the digital connections that make them more effective in the future.

"We're in a world that is changing now, and we've got to respond. It is a world of growing Russian aggression, it's those daily cyber attacks, new nuclear risks and increasing threats in other parts of the world as well."

His comments come as the government prepares to publish the (SDR), which will set out plans to boost military spending in the next few years.

"The SDR we publish tomorrow will set out a vision for not only how our forces must respond, but how we protect the British people as well."

As part of the review, £1.5bn will be committed to , in a bid to revive Britain's industrial base.

"We are strengthening the UK's industrial base to better deter our adversaries and make the UK secure at home and strong abroad," Mr Healey added. "This is a message to Moscow as well. This is Britain standing behind making our Armed Forces stronger but [also] making our industrial base stronger. This is part of our readiness to fight if required, but the strength in which to deter those fights in the future."