BRITAIN is to build a powerful new ballistic missile for Ukraine to obliterate Russian targets deep behind enemy lines.

Nightfall rockets will carry 200kg warheads and have a range of 310 miles — enough to strike as far as Moscow from the battlefield.John Healey at the scene of a drone attack which hit a residential area and killed one person in KyivCredit

They can be launched, in quick succession, from vehicles before Russia can respond.

British firms are being sought for the £9million contract to design, develop and deliver the first three missiles for test firings.

Defence Secretary John Healey revealed Project Nightfall to The Sun on Sunday.

He said: “You defend your cities by having layers of defence, and you partly defend by being able to attack.”

He spoke after coming dangerously close to a Kremlin rocket barrage.

A source said he had a “close shave” near Lviv in which an Oreshnik missile was fired on Thursday in tandem with a drone attack on Kyiv, which killed four.

Mr Healey, whose train had to make an emergency stop, said: “We were close enough to hear the air raid sirens.

It was a serious moment and a stark reminder of the barrage of drones and missiles hitting Ukrainians in sub-zero conditions.