Sweden is preparing to issue a public information manual on what to do in the event of war, as debate in the country grows over how to deal with the threat from Russia.

The brochure, due to be sent to 4.7m households, will inform the public how they can take part in “total defence” during a war and secure water, food and heating.

The booklet with the working title If Crisis or War Comes will also give guidance on dealing with threats from cyber attacks, terrorism and climate change, the FT reported.

Russia’s annexation of Crimea and military support for Ukrainian separatists, along with increased activity and exercises near the Baltics and Scandinavia have caused deep unease in Sweden.

The neutral country has begun to reverse deep post war defence cuts and incursions by Russian planes and submarines have sparked intense public debate over whether to join Nato.