The UK gets nearly 40% of its gas from Norway and is imported into the country through a giant 700-mile pipeline called the Langeled. The monster pipe runs from the Nyhamna gas processing plant on the Norwegian island of Gossa to the Easington gas terminal in County Durham.

A Russian spy ship called the Yantar was caught snooping around the North Sea in recent months, eyeing up the UK's underwater energy infrastructure.

The Yantar is reported to be able to send a submarine 20,000ft underwater and is packed with explosives to blow up pipelines.

A source said: "We know that the Russians are active in the North Sea and have the power to cripple our energy links.

"We need to become much more self-sufficient, and quickly. And households should be ready for all eventualities."

EU security chiefs have already advised EU countries to pack a three-day survival kit in the event that Russia attacks their energy systems. Now, Brits are being urged to do the same thing, reports Mail.

The survival kit should include water, non-perishable food like tins of beans and Spam, medicines, a battery-powered radio, a torch, identity documents and a Swiss Army knife.