China could wreak havoc in the UK (Image: Getty)

China could use โ€œweapons of mass disruptionโ€ to cripple the National Grid and bring the country to a standstill, a former head of MI6 has warned. Sir Richard Dearlove declared that the growing industrial reliance on tech from the Communist state could lead to a doomsday scenario in an international crisis.

Beijing, Sir Richard said, might plunge the country into darkness by tampering with the National Grid. And they could immobilise public transport networks which are now using parts from China. This is because the UK has lost capacity to replace failing equipment in water, sewage, gas networks, rail, underground transport, traffic lights and communications.

In a glum assessment for MPs, the former spy chief said: โ€œSuch peacetime dependencies give China strategic leverage and in a crisis it gives them weapons of mass disruption which could literally bring this country to a complete standstill.โ€

Sir Richardโ€™s warning came at a reception for MPs and peers hosted by the Coalition on Secure Technology.

He said: โ€œOur foreign policy is therefore fettered and could even be held to ransom.

โ€œIn complacently de-industrialising we have not merely lost an industry, we have actually lost the ability to rebuild the energy system ourselves.

โ€œLarge scale transformers today take two years to arrive, generators up to three.

โ€œAnd the grain oriented industrial steel for which there is no substitute comes from China, whose production capacity now dwarfs that of any other state.

โ€œEurope has just two producers of that steel remaining, both plagued by reductions and closures as China undercuts the market.

โ€œBritain and its allies do retain the capacity to design and assemble the apparatus on which the grid depends.

โ€œBut the material without which none of this can be built is now concentrated in the hands of the very country which the director general of MI5 has identified as the most serious threat to Britainโ€™s national security.โ€

Sir Richard warned that relationships between allies could become strained if China turned on the West.

China could disrupt the National Grid, MPs were warned (Image: Getty)

He stressed that the Chinese Communist Party โ€œthinks long term and it does not have to worry about re-election, only about its political survival.โ€

The former spy chief added: โ€œOne of its policies, pursued with great success, has been to build dependencies not just in its own regional sphere of influence but globally.

โ€œWe have seen the leverage that its domination of the production of rare earths has secured and we have watched how Huawei, a company very closely associated with the Peopleโ€™s Liberation Army, has knocked out its foreign competitors and spread its communications technology around the world.

โ€œLondon Transport has recently started to purchase Chinese electric buses made with the benefit of large state subsidies, all of them subject to software control by the manufacturer.

โ€œThe idea that โ€˜your number 22 is not running today because itโ€™s just been immobilised by the manufacturerโ€™ is fairly comic.

โ€œBut the weakening of the electricity grid is altogether of another order.โ€

Claimning that Chinaโ€™s leader Xi Jinpingโ€™s hoped for his country to achieve global dominance by 2049, Sir Richard added: โ€œWe should take the threat seriously because the methodology for doing it is being put in place under our very noses.โ€