British military chiefs fear a 'nightmare scenario' of fighting major wars against Russia and China at the same time, and are preparing for the West's enemies to launch coordinated campaigns.

General Sir Patrick Sanders, the former head of the British army, revealed that the Ministry of Defence has drawn up plans for how to respond to wars breaking out simultaneously on two fronts.

He said such crisis could erupt within two years, and told The Times' podcast The General and The Journalist how such a scenario could play out.

'We could end up with the axis powers - Russia and China, supported potentially by Iran and North Korea - collaborating to create a war on two fronts,' he said.

'It would start with a large-scale confrontation in the Indo-Pacific, like a Chinese invasion of Taiwan, which draws off what remains of US forces in Europe.