Russia's horror WW3 threat to UK - 'Missile attacks and civilian fatalities'

A Government risk assessment has found an attack by on the would likely result in the death of civilians, reports say. Britain is said to be overhauling 20-year-old defence preparations amid growing concerns over the threat posed by , with ministers worried the is not ready for war on home soil.

The "homeland defence plan" dossier is being updated to set out what should happen in the days following a strike on the mainland by a hostile foreign state, reports. The classified review is reportedly being led by the Cabinet Office and includes different attack scenarios. One that's already been modelled involves simultaneous cyber attacks and missile strikes on British infrastructure.

A risk assessment reportedly published in January said such an attack was "likely to result in civilian fatalities as well as members of the emergency services".

It also warned of "serious economic damage and disruption to essential services".

The reported review of the plan underlines concerns over the dangers posed by 's .

The Kremlin has made repeated threats over the UK's support for as peace talks over the war continue to make slow progress.

Ministers are said to be concerned over Britain's readiness for conflict at home, while also being outgunned by and its allies.

Experts have and calls have been increasing for the UK to air defence system.

The updated plan is set to address cyber warfare for the first time with ramping up cyber attacks since its full-scale invasion of , according to .

It was last updated in 2005 when lacked the capability to strike the UK mainland with conventional weapons and when cyber warfare was less prevalent.

The document will direct ministers on how to run a wartime government, with Britain divided into 12 zones each controlled by a minister, senior military official, judge and chief constable with sweeping emergency powers.

It also includes details around evacuating members of the , public service broadcasts and stockpiling of food.

The plans are said to be based on the War Book, a secret Cold War dossier of instructions on how the country should respond to a nuclear attack, which were recently released by the National Archives.